UPD75008 查看數據表（PDF） - NEC => Renesas Technology

零件编号

产品描述 (功能)

生产厂家

UPD75008

4-BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

µPD75004, 75006, 75008

5.3 CLOCK OUTPUT CIRCUIT

The clock output circuit outputs clock pulse from the P22/PCL pin. This clock output circuit is used to output

clock pulses to the remote control output, peripheral LSIs, etc.

• Clock output (PCL) : Φ, 524, 262, 65.5 kHz (operating at 4.19 MHz)

• Buzzer output (BUZ) : 2 kHz (operating at 4.19 MHz, or 32.768 kHz)

Fig. 5-2 shows the clock output circuit configuration.

From the

clock

generator

Φ

fX/23

fX/24

fX/26

Selector

Output

buffer

PCL/P22

CLOM3 CLOM2 CLOM1 CLOM0 CLOM

PORT2.2

P22 output

latch

4

Internal bus

Bit 2 of PMGB

Port 2 input/

output mode

specification

bit

Fig. 5-2 Clock Output Circuit Configuration

Remarks: A measures to prevent outputting narrow width pulse when selecting clock output enable/

disable is taken.

22

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