UPD17217CT-XXX View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD17217CT-XXX

4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER

NEC => Renesas Technology 

µPD17215, 17216, 17217, 17218

5.2 Function of 8-bit Timer (with modulo function)

3

TMEN

2

TMRES

1

TMCK1

0

TMCK0

Address

RF : 33H

On reset

8H *1

R/W

R/W*2

TMCK1

0

0

1

TMCK0

8-Bit Timer Clock Source Selection

Count clock: fX/32

0

(Measurement time range: 8 µ s to 2.048 ms)

Count clock: fX/64

1

(Measurement time range: 16 µs to 4.096 ms)

Count clock : fX/256

0

(Measurement time range: 64 µs to 16.384 ms)

1

1

Remote control carrier generation circuit output

Value indicated by parentheses is for when

( ): f SYS (system clock) = f X = 4MHz

TMRES 8-Bit Timer Reset Flag

0

Data read out is always "0"

1

Resets 8-bit counter and IRQTM

TMEN 8-Bit Timer Count Enable Flag

0

Stops 8-bit timer count operation

1

Enable 8-bit timer count operation (falling edge)

*1: When the STOP mode is released, bit 3 must be set.

2: Bit 2 is a write-only bit.

NRZLTMM

76543210

Address

On reset

R/W

×

7-bit modulo register

Peripheral register: 03H

Undefined

R/W

Bit 7

0

1

Output Control of REM Pin

When NRZ = 1, carrier output to REM pin

When NRZ = 1, high-level output to REM pin

NRZHTMM

76543210

0

7-bit modulo register

Address

Peripheral register: 04H

Bit 7

Fixed to 0

On reset

Undefined

R/W

R/W

31

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