EGU — Event generator unit

The Event generator unit (EGU) provides support for inter-layer signaling. This means support for atomic triggering of both CPU execution and hardware tasks from both firmware (by CPU) and hardware (by PPI). This feature can, for instance, be used for triggering CPU execution at a lower priority execution from a higher priority execution, or to handle a peripheral's ISR execution at a lower priority for some of its events. However, triggering any priority from any priority is possible.

Listed here are the main EGU features:

Enables SW triggering of interrupts
6 EGU instances – separate interrupt vectors
Up to 16 separate event flags per interrupt for multiplexing

The EGU implements a set of tasks which can individually be triggered to generate the corresponding event, i.e., the corresponding event for TASKS_TRIGGER[n] is EVENTS_TRIGGERED[n].

Table 1. EGU configuration
EGU instance	Number of event flags
0-5	16

Registers

Table 2. Instances
Base address	Peripheral	Instance	Description
0x40014000	EGU	EGU0	Event Generator Unit 0
0x40015000	EGU	EGU1	Event Generator Unit 1
0x40016000	EGU	EGU2	Event Generator Unit 2
0x40017000	EGU	EGU3	Event Generator Unit 3
0x40018000	EGU	EGU4	Event Generator Unit 4
0x40019000	EGU	EGU5	Event Generator Unit 5

Table 3. Register Overview
Register	Offset	Description
TASKS_TRIGGER[0]	0x000	Trigger 0 for triggering the corresponding TRIGGERED[0] event
TASKS_TRIGGER[1]	0x004	Trigger 1 for triggering the corresponding TRIGGERED[1] event
TASKS_TRIGGER[2]	0x008	Trigger 2 for triggering the corresponding TRIGGERED[2] event
TASKS_TRIGGER[3]	0x00C	Trigger 3 for triggering the corresponding TRIGGERED[3] event
TASKS_TRIGGER[4]	0x010	Trigger 4 for triggering the corresponding TRIGGERED[4] event
TASKS_TRIGGER[5]	0x014	Trigger 5 for triggering the corresponding TRIGGERED[5] event
TASKS_TRIGGER[6]	0x018	Trigger 6 for triggering the corresponding TRIGGERED[6] event
TASKS_TRIGGER[7]	0x01C	Trigger 7 for triggering the corresponding TRIGGERED[7] event
TASKS_TRIGGER[8]	0x020	Trigger 8 for triggering the corresponding TRIGGERED[8] event
TASKS_TRIGGER[9]	0x024	Trigger 9 for triggering the corresponding TRIGGERED[9] event
TASKS_TRIGGER[10]	0x028	Trigger 10 for triggering the corresponding TRIGGERED[10] event
TASKS_TRIGGER[11]	0x02C	Trigger 11 for triggering the corresponding TRIGGERED[11] event
TASKS_TRIGGER[12]	0x030	Trigger 12 for triggering the corresponding TRIGGERED[12] event
TASKS_TRIGGER[13]	0x034	Trigger 13 for triggering the corresponding TRIGGERED[13] event
TASKS_TRIGGER[14]	0x038	Trigger 14 for triggering the corresponding TRIGGERED[14] event
TASKS_TRIGGER[15]	0x03C	Trigger 15 for triggering the corresponding TRIGGERED[15] event
EVENTS_TRIGGERED[0]	0x100	Event number 0 generated by triggering the corresponding TRIGGER[0] task
EVENTS_TRIGGERED[1]	0x104	Event number 1 generated by triggering the corresponding TRIGGER[1] task
EVENTS_TRIGGERED[2]	0x108	Event number 2 generated by triggering the corresponding TRIGGER[2] task
EVENTS_TRIGGERED[3]	0x10C	Event number 3 generated by triggering the corresponding TRIGGER[3] task
EVENTS_TRIGGERED[4]	0x110	Event number 4 generated by triggering the corresponding TRIGGER[4] task
EVENTS_TRIGGERED[5]	0x114	Event number 5 generated by triggering the corresponding TRIGGER[5] task
EVENTS_TRIGGERED[6]	0x118	Event number 6 generated by triggering the corresponding TRIGGER[6] task
EVENTS_TRIGGERED[7]	0x11C	Event number 7 generated by triggering the corresponding TRIGGER[7] task
EVENTS_TRIGGERED[8]	0x120	Event number 8 generated by triggering the corresponding TRIGGER[8] task
EVENTS_TRIGGERED[9]	0x124	Event number 9 generated by triggering the corresponding TRIGGER[9] task
EVENTS_TRIGGERED[10]	0x128	Event number 10 generated by triggering the corresponding TRIGGER[10] task
EVENTS_TRIGGERED[11]	0x12C	Event number 11 generated by triggering the corresponding TRIGGER[11] task
EVENTS_TRIGGERED[12]	0x130	Event number 12 generated by triggering the corresponding TRIGGER[12] task
EVENTS_TRIGGERED[13]	0x134	Event number 13 generated by triggering the corresponding TRIGGER[13] task
EVENTS_TRIGGERED[14]	0x138	Event number 14 generated by triggering the corresponding TRIGGER[14] task
EVENTS_TRIGGERED[15]	0x13C	Event number 15 generated by triggering the corresponding TRIGGER[15] task
INTEN	0x300	Enable or disable interrupt
INTENSET	0x304	Enable interrupt
INTENCLR	0x308	Disable interrupt

INTEN

Address offset: 0x300

Enable or disable interrupt

Bit number				31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Id																				P	O	N	M	L	K	J	I	H	G	F	E	D	C	B	A
Reset 0x00000000				0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Id	RW	Field	Value Id	Value								Description
A	RW	TRIGGERED0										Enable or disable interrupt for TRIGGERED[0] event See EVENTS_TRIGGERED[0]
			Disabled	0								Disable
			Enabled	1								Enable
B	RW	TRIGGERED1										Enable or disable interrupt for TRIGGERED[1] event See EVENTS_TRIGGERED[1]
			Disabled	0								Disable
			Enabled	1								Enable
C	RW	TRIGGERED2										Enable or disable interrupt for TRIGGERED[2] event See EVENTS_TRIGGERED[2]
			Disabled	0								Disable
			Enabled	1								Enable
D	RW	TRIGGERED3										Enable or disable interrupt for TRIGGERED[3] event See EVENTS_TRIGGERED[3]
			Disabled	0								Disable
			Enabled	1								Enable
E	RW	TRIGGERED4										Enable or disable interrupt for TRIGGERED[4] event See EVENTS_TRIGGERED[4]
			Disabled	0								Disable
			Enabled	1								Enable
F	RW	TRIGGERED5										Enable or disable interrupt for TRIGGERED[5] event See EVENTS_TRIGGERED[5]
			Disabled	0								Disable
			Enabled	1								Enable
G	RW	TRIGGERED6										Enable or disable interrupt for TRIGGERED[6] event See EVENTS_TRIGGERED[6]
			Disabled	0								Disable
			Enabled	1								Enable
H	RW	TRIGGERED7										Enable or disable interrupt for TRIGGERED[7] event See EVENTS_TRIGGERED[7]
			Disabled	0								Disable
			Enabled	1								Enable
I	RW	TRIGGERED8										Enable or disable interrupt for TRIGGERED[8] event See EVENTS_TRIGGERED[8]
			Disabled	0								Disable
			Enabled	1								Enable
J	RW	TRIGGERED9										Enable or disable interrupt for TRIGGERED[9] event See EVENTS_TRIGGERED[9]
			Disabled	0								Disable
			Enabled	1								Enable
K	RW	TRIGGERED10										Enable or disable interrupt for TRIGGERED[10] event See EVENTS_TRIGGERED[10]
			Disabled	0								Disable
			Enabled	1								Enable
L	RW	TRIGGERED11										Enable or disable interrupt for TRIGGERED[11] event See EVENTS_TRIGGERED[11]
			Disabled	0								Disable
			Enabled	1								Enable
M	RW	TRIGGERED12										Enable or disable interrupt for TRIGGERED[12] event See EVENTS_TRIGGERED[12]
			Disabled	0								Disable
			Enabled	1								Enable
N	RW	TRIGGERED13										Enable or disable interrupt for TRIGGERED[13] event See EVENTS_TRIGGERED[13]
			Disabled	0								Disable
			Enabled	1								Enable
O	RW	TRIGGERED14										Enable or disable interrupt for TRIGGERED[14] event See EVENTS_TRIGGERED[14]
			Disabled	0								Disable
			Enabled	1								Enable
P	RW	TRIGGERED15										Enable or disable interrupt for TRIGGERED[15] event See EVENTS_TRIGGERED[15]
			Disabled	0								Disable
			Enabled	1								Enable

INTENSET

Address offset: 0x304

Enable interrupt

Bit number				31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Id																				P	O	N	M	L	K	J	I	H	G	F	E	D	C	B	A
Reset 0x00000000				0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Id	RW	Field	Value Id	Value								Description
A	RW	TRIGGERED0										Write '1' to Enable interrupt for TRIGGERED[0] event See EVENTS_TRIGGERED[0]
			Set	1								Enable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
B	RW	TRIGGERED1										Write '1' to Enable interrupt for TRIGGERED[1] event See EVENTS_TRIGGERED[1]
			Set	1								Enable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
C	RW	TRIGGERED2										Write '1' to Enable interrupt for TRIGGERED[2] event See EVENTS_TRIGGERED[2]
			Set	1								Enable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
D	RW	TRIGGERED3										Write '1' to Enable interrupt for TRIGGERED[3] event See EVENTS_TRIGGERED[3]
			Set	1								Enable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
E	RW	TRIGGERED4										Write '1' to Enable interrupt for TRIGGERED[4] event See EVENTS_TRIGGERED[4]
			Set	1								Enable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
F	RW	TRIGGERED5										Write '1' to Enable interrupt for TRIGGERED[5] event See EVENTS_TRIGGERED[5]
			Set	1								Enable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
G	RW	TRIGGERED6										Write '1' to Enable interrupt for TRIGGERED[6] event See EVENTS_TRIGGERED[6]
			Set	1								Enable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
H	RW	TRIGGERED7										Write '1' to Enable interrupt for TRIGGERED[7] event See EVENTS_TRIGGERED[7]
			Set	1								Enable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
I	RW	TRIGGERED8										Write '1' to Enable interrupt for TRIGGERED[8] event See EVENTS_TRIGGERED[8]
			Set	1								Enable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
J	RW	TRIGGERED9										Write '1' to Enable interrupt for TRIGGERED[9] event See EVENTS_TRIGGERED[9]
			Set	1								Enable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
K	RW	TRIGGERED10										Write '1' to Enable interrupt for TRIGGERED[10] event See EVENTS_TRIGGERED[10]
			Set	1								Enable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
L	RW	TRIGGERED11										Write '1' to Enable interrupt for TRIGGERED[11] event See EVENTS_TRIGGERED[11]
			Set	1								Enable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
M	RW	TRIGGERED12										Write '1' to Enable interrupt for TRIGGERED[12] event See EVENTS_TRIGGERED[12]
			Set	1								Enable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
N	RW	TRIGGERED13										Write '1' to Enable interrupt for TRIGGERED[13] event See EVENTS_TRIGGERED[13]
			Set	1								Enable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
O	RW	TRIGGERED14										Write '1' to Enable interrupt for TRIGGERED[14] event See EVENTS_TRIGGERED[14]
			Set	1								Enable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
P	RW	TRIGGERED15										Write '1' to Enable interrupt for TRIGGERED[15] event See EVENTS_TRIGGERED[15]
			Set	1								Enable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled

INTENCLR

Address offset: 0x308

Disable interrupt

Bit number				31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Id																				P	O	N	M	L	K	J	I	H	G	F	E	D	C	B	A
Reset 0x00000000				0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Id	RW	Field	Value Id	Value								Description
A	RW	TRIGGERED0										Write '1' to Disable interrupt for TRIGGERED[0] event See EVENTS_TRIGGERED[0]
			Clear	1								Disable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
B	RW	TRIGGERED1										Write '1' to Disable interrupt for TRIGGERED[1] event See EVENTS_TRIGGERED[1]
			Clear	1								Disable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
C	RW	TRIGGERED2										Write '1' to Disable interrupt for TRIGGERED[2] event See EVENTS_TRIGGERED[2]
			Clear	1								Disable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
D	RW	TRIGGERED3										Write '1' to Disable interrupt for TRIGGERED[3] event See EVENTS_TRIGGERED[3]
			Clear	1								Disable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
E	RW	TRIGGERED4										Write '1' to Disable interrupt for TRIGGERED[4] event See EVENTS_TRIGGERED[4]
			Clear	1								Disable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
F	RW	TRIGGERED5										Write '1' to Disable interrupt for TRIGGERED[5] event See EVENTS_TRIGGERED[5]
			Clear	1								Disable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
G	RW	TRIGGERED6										Write '1' to Disable interrupt for TRIGGERED[6] event See EVENTS_TRIGGERED[6]
			Clear	1								Disable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
H	RW	TRIGGERED7										Write '1' to Disable interrupt for TRIGGERED[7] event See EVENTS_TRIGGERED[7]
			Clear	1								Disable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
I	RW	TRIGGERED8										Write '1' to Disable interrupt for TRIGGERED[8] event See EVENTS_TRIGGERED[8]
			Clear	1								Disable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
J	RW	TRIGGERED9										Write '1' to Disable interrupt for TRIGGERED[9] event See EVENTS_TRIGGERED[9]
			Clear	1								Disable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
K	RW	TRIGGERED10										Write '1' to Disable interrupt for TRIGGERED[10] event See EVENTS_TRIGGERED[10]
			Clear	1								Disable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
L	RW	TRIGGERED11										Write '1' to Disable interrupt for TRIGGERED[11] event See EVENTS_TRIGGERED[11]
			Clear	1								Disable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
M	RW	TRIGGERED12										Write '1' to Disable interrupt for TRIGGERED[12] event See EVENTS_TRIGGERED[12]
			Clear	1								Disable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
N	RW	TRIGGERED13										Write '1' to Disable interrupt for TRIGGERED[13] event See EVENTS_TRIGGERED[13]
			Clear	1								Disable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
O	RW	TRIGGERED14										Write '1' to Disable interrupt for TRIGGERED[14] event See EVENTS_TRIGGERED[14]
			Clear	1								Disable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled
P	RW	TRIGGERED15										Write '1' to Disable interrupt for TRIGGERED[15] event See EVENTS_TRIGGERED[15]
			Clear	1								Disable
			Disabled	0								Read: Disabled
			Enabled	1								Read: Enabled

Electrical specification

EGU Electrical Specification

Symbol	Description				Min.	Typ.	Max.	Units
t_EGU,EVT	Latency between setting an EGU event flag and the system setting an interrupt					1		cycles