4570 datasheet(52/69 Pages) RENESAS

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MITSUBISHI MICROCOMPUTERS

4570 Group

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

CONTROL REGISTERS (CONTINUED)

Timer control register W1

W13

W12

W11

W10

at reset : 00002

at RAM back-up : 00002

R/W

Stop (prescaler state initialized)

Operating

Instruction clock divided by 4

Instruction clock divided by 8

Prescaler output (ORCLK)

Carrier output (CARRY)

Stop (state retained)

Operating

Prescaler control bit

Prescaler dividing ratio selection bit

Timer 1 count source selection bit

Timer 1 control bit

Timer control register W2

at reset : 00002

at RAM back-up : state retained

R/W

Stop (state retained)

Operating

Port D9

TOUT pin

W23

W22

W21

W20

Timer 2 control bit

Port D9/TOUT pin function selection bit

Timer 2 count source selection bits

W21

Count source

Prescaler output (ORCLK)

Timer 1 underflow signal

Instruction clock

16-bit timer underflow signal

Timer control register W3

at reset : 00002

at RAM back-up : state retained

R/W

Stop (state retained)

Operating

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

W33

W32

W31

W30

Timer 3 control bit

Not used

Timer 3 count source selection bits

W20

W31

W30

Count source

Timer 2 underflow signal

Prescaler output (ORCLK)

f(XIN) or f(XIN)/2

Not available

Timer count value store register W5

at reset : 002

at RAM back-up : state retained

R/W

2-bit register. The contents of the high-order 2 bits (bits 9 and 8) of the 10-bit ROM pattern at address (D2D1D0A3A2A1A0) in page

p specified by registers D and A is stored in this register W5 with the TABP p instruction.

In addition, data can be transferred between the low-order 2 bits of register A and this register W5 with the TW5A or TAW5

instruction. Data can be read/written to/from the high-order 2 bits of timer 1 with the T1AB or TAB1 instruction.

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

4570 Datasheet(PDF) 52 Page - Renesas Technology Corp

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