4571 datasheet(19/126 Pages) RENESAS

19 / 126 page

Rev.1.02

May 25, 2007

Page 19 of 124

REJ03B0179-0102

4571 Group

(6) Interrupt control registers

• Interrupt control register V1

Interrupt enable bits of external 0, external 1, timer 1 and timer 2

are assigned to register V1. Set the contents of this register

through register A with the TV1A instruction. The TAV1

instruction can be used to transfer the contents of register V1 to

• Interrupt control register V2

The voltage drop detection circuit interrupt enable bit and timer 3

interrupt enable bit are assigned to register V2. Set the contents

of this register through register A with the TV2A instruction. The

TAV2 instruction can be used to transfer the contents of register

V2 to register A.

Note 1.“R” represents read enabled, and “W” represents write enabled.

Table 13 Interrupt control registers

Interrupt control register V1

at reset : 00002

at RAM back-up : 00002

R/W

TAV1/TV1A

V13

Timer 2 interrupt enable bit

Interrupt disabled (SNZT2 instruction is valid)

Interrupt enabled (SNZT2 instruction is invalid)

V12

Timer 1 interrupt enable bit

Interrupt disabled (SNZT1 instruction is valid)

Interrupt enabled (SNZT1 instruction is invalid)

V11

External 1 interrupt enable bit

Interrupt disabled (SNZ1 instruction is valid)

Interrupt enabled (SNZ1 instruction is invalid)

V10

External 0 interrupt enable bit

Interrupt disabled (SNZ0 instruction is valid)

Interrupt enabled (SNZ0 instruction is invalid)

Interrupt control register V2

at reset : 00002

at RAM back-up : 00002

R/W

TAV2/TV2A

V23

Voltage drop detector interrupt enable bit

Interrupt disabled (SNZVD instruction is valid)

Interrupt enabled (SNZVD instruction is invalid)

V22

Not used

This bit has no function, but read/write is enabled.

V21

Not used

This bit has no function, but read/write is enabled.

V20

Timer 3 interrupt enable bit

Interrupt disabled (SNZT3 instruction is valid)

Interrupt enabled (SNZT3 instruction is invalid)

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