SEC1210 datasheet(40/218 Pages) MICROCHIP

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SEC1110/SEC1210

DS00001561C-page 40

 2013 - 2016 Microchip Technology Inc.

9.1.21

INTERRUPT PRIORITY REGISTERS – IP0, IP1

The 18 interrupt sources are grouped into 6 priority groups. For each of the groups, one of four priority levels can be

selected. It is achieved by setting appropriate values in the IP0 and IP1 registers.

The contents of the interrupt priority registers define the priority levels for each interrupt source according to the tables

below.

TABLE 9-28:

INTERRUPT PRIORITY 0 REGISTER

IP0

(SFR 0XA9 - RESET=0X00)

INTERRUPT PRIORITY 0 REGISTER

BIT

NAME

R/W

DESCRIPTION

Reserved

R/W

Always read as 0

wdts

R/W

Watchdog Timer Status Flag:

This bit is not set by hardware when the watchdog timer reset occurs.

If the RESET_SRC_WDOG bit in the CLKPWR_TEST4 Register is set,

it indicates that the chip reset was due to a watchdog timer reset.

5:0

R/W

Interrupt Priority:

Each bit together with the corresponding bit from the IP1 Register

specifies the priority level of the respective interrupt priority group.

TABLE 9-29:

INTERRUPT PRIORITY 1 REGISTER

IP1

(SFR 0XB9 - RESET=0X00)

INTERRUPT PRIORITY 1 REGISTER

BIT

NAME

R/W

DESCRIPTION

7:6

Reserved

R/W

Always read as 0

5:0

R/W

Interrupt Priority:

Each bit together with the corresponding bit from the IP0 Register

specifies the priority level of the respective interrupt priority group.

TABLE 9-30:

PRIORITY GROUPS

GROUP

CORRESPONDING

INTERRUPT BITS

INTERRUPTS IN EACH GROUP

IP1.0, IP0.0

Ext Interrupt 0 - or

of all interrupts

except GPIOs

Ext Interrupt 7 -

Reserved

IP1.1, IP0.1

Timer 0 Interrupt

External Interrupt 8

- Endpoint 1

External Interrupt 2

- SPI1 Interrupt

IP1.2, IP0.2

External Interrupt 1

- GPIO port 0,1

External Interrupt 9

- Endpoint 2

External Interrupt 3

- Endpoint 3

IP1.3, IP0.3

Timer 1 Interrupt

External Interrupt

10 - Endpoint 5

External Interrupt 4

- Endpoint 4

IP1.4, IP0.4

16550 UART

Interrupt

External Interrupt

11 - Endpoint 0

External Interrupt 5

- USB Interrupt

IP1.5, IP0.5

Timer 2 Interrupt

External Interrupt

12 - Smart Card

1/2

Reserved

External Interrupt 6

- Power Status

Event

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