CC2430 Datasheet, PDF (60/234 Pages) Texas Instruments – A True System-on-Chip solution for 2.4 GHz IEEE 802.15.4 / ZigBee-TM

CC2430
IRCON2 (0xE8) – Interrupt Flags 5
Bit Name
7:5 _-
4 _WDTIF
Reset R/W
00
R/W
0
R/W
3 _P1IF
0
R/W
2 _UTX1IF
0
R/W
1 _UTX0IF
0
R/W
0 _P2IF
0
R/W
Description
Not used
WDTIF – Watchdog timer interrupt flag.
0 Interrupt not pending
1 Interrupt pending
P1IF – Port 1 interrupt flag.
0 Interrupt not pending
1 Interrupt pending
UTX1IF – USART1 TX interrupt flag.
0 Interrupt not pending
1 Interrupt pending
UTX0IF – USART0 TX interrupt flag.
0 Interrupt not pending
1 Interrupt pending
P2IF – Port2 interrupt flag.
0 Interrupt not pending
1 Interrupt pending
12.7.3 Interrupt Priority
The interrupts are grouped into six interrupt
priority groups and the priority for each group
is set by the registers IP0 and IP1. In order to
assign a higher priority to an interrupt, i.e. to its
interrupt group, the corresponding bits in IP0
and IP1 must be set as shown in Table 30 on
page 61.
The interrupt priority groups with assigned
interrupt sources are shown in Table 31. Each
group is assigned one of four priority levels.
While an interrupt service request is in
progress, it cannot be interrupted by a lower or
same level interrupt.
In the case when interrupt requests of the
same priority level are received
simultaneously, the polling sequence shown in
Table 32 is used to resolve the priority of each
request.
CC2430 PRELIMINARY Data Sheet (rev. 1.03) SWRS036A
Page 60 of 232