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UPD750064CU Datasheet(PDF) 26 Page - NEC

Part # UPD750064CU
Description  4-BIT SINGLE-CHIP MICROCONTROLLERS
PDF  82 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD750064CU Datasheet(HTML) 26 Page - NEC

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µPD750064, 750066, 750068, 750064(A), 750066(A), 750068(A)
Data Sheet U10165EJ2V0DS00
6.4 Clock Output Circuit
The clock output circuit is provided to output the clock pulses from the P22/PCL pin to the remote control wave
output applications and peripheral LSIs.
• Clock output (PCL) :
Φ, 1.05 MHz, 262 kHz, 65.5 kHz (@ 4.19-MHz operation)
:
Φ, 1.5 MHz, 375 kHz, 93.8 kHz (@ 6.0-MHz operation)
Figure 6-3. Clock Output Circuit Block Diagram
From clock
generator
Φ
fX/22
fX/24
fX/26
Selector
CLOM3
0
CLOM1 CLOM0
4
CLOM
P22
output latch
Port 2 I/O mode
specification bit
PORT2.2
Bit 2 of PMGB
Internal bus
Output buffer
PCL/P22
Remark Special care has been taken in designing the chip so that small-width pulses may not be output
when switching clock output enable/disable.



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