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UPD75512 Datasheet(PDF) 21 Page - NEC

Part # UPD75512
Description  4-BIT SINGLE-CHIP MICROCOMPUTER
PDF  64 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD75512 Datasheet(HTML) 21 Page - NEC

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µPD75512(A)
21
5.3
CLOCK OUTPUT CIRCUIT
The clock output circuit outputs clock pulse from the P22/PCL pin. This clock pulse is used for the remote control
output, peripheral LSIs, etc.
• Clock output (PCL):
Φ, 524 kHz, 262 kHz, 65.5 kHz (operating at 4.19 MHz)
Fig. 5-2 Clock Output Circuit Configuration
Remarks:
A measures to prevent outputting narrow width pulse when selecting clock output enable/
disable is taken.
Selector
Output
buffer
PCL/P22
Bit 2 of PMGB
PORT2.2
Port 2 input/
output mode
specification
bit
P22 output
latch
Internal bus
CLOM3 CLOM2 CLOM1 CLOM0 CLOM
4
Φ
fX/23
fX/24
fX/26
From the
clock
generator



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