UPD75402 Просмотр технического описания (PDF) - NEC => Renesas Technology

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UPD75402

4 BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

µPD75402A(A)

5.3 CLOCK OUTPUT CIRCUIT

The clock output circuit, which outputs clock pulses from pin P22/PCL, is used for supplying clock pulses

for peripheral LSIs or for remote control output.

• Clock output (PCL): 1.05 MHz, 524 kHz, 65.5 kHz (when fXX is 4.19 MHz).

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

Fig. 5-2 Configuration of the Clock Output Circuit

From the clock

generator

Φ

f XX/26

Selector

Output

buffer

P22/PCL

CLOM3 0 CLOM1 CLOM0 CLOM

PORT2.2

P22 output

latch

4

Internal bus

Bit 2 of PMGB

Port 2 input/

output mode

specification bit

Remark The clock output circuit is designed not to output high-frequency pulses when clock output is

switched between the enable and disable states.

16

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