4502 Datasheet, PDF(53/116 Page) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

4502 Datasheet, PDF (53/116 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

◁

4502 Group

Timer control register W1

at reset : 00002

at RAM back-up : 00002

R/W

W13 Prescaler control bit

W12 Prescaler dividing ratio selection bit

W11

W10

Timer 1 control bit

Timer 1 count start synchronous circuit

control bit

Stop (state initialized)

Operating

Instruction clock divided by 4

Instruction clock divided by 16

Stop (state retained)

Operating

Count start synchronous circuit not selected

Count start synchronous circuit selected

Timer control register W2

at reset : 00002

at RAM back-up : state retained

R/W

W23

W22

W21

W20

Timer 2 control bit

Timer 1 count auto-stop circuit selection

bit (Note 2)

Timer 2 count source selection bits

0 Stop (state retained)

1 Operating

0 Count auto-stop circuit not selected

1 Count auto-stop circuit selected

W21 W20

Count source

0 0 Timer 1 underflow signal

0 1 Prescaler output (ORCLK)

1 0 CNTR input

1 1 System clock

W63

Timer control register W6

Not used

W62 Not used

W61 CNTR output selection bit

W60 P12/CNTR function selection bit

at reset : 00002

at RAM back-up : state retained

R/W

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

0 Timer 1 underflow signal divided by 2 output

1 Timer 2 underflow signal divided by 2 output

0 P12(I/O)/CNTR input (Note 3)

1 P12 (input)/CNTR input/output (Note 3)

A/D control register Q1

at reset : 00002

at RAM back-up : state retained

Q13 A/D operation mode selection bit

Q12 Not used

Q11

Analog input pin selection bits

Q10

Q11 Q10

A/D conversion mode

Comparator mode

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

AIN0

AIN1

AIN2

AIN3

Selected pins

Notes 1: âRâ represents read enabled, and âWâ represents write enabled.

2: This function is valid only when the timer 1 count start synchronization circuit is selected.

3: CNTR input is valid only when CNTR input is selected as the timer 2 count source.

R/W

Rev.3.01 2005.02.02 page 53 of 112

REJ03B0105-0301

▷