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UPD178024GC Datasheet(PDF) 20 Page - NEC

No. de pieza UPD178024GC
Descripción Electrónicos  8-BIT SINGLE-CHIP MICROCONTROLLER
PDF  56 Pages
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Fabricante Electrónico  NEC [NEC]
Página de inicio  http://www.nec.com/
Logo NEC - NEC

UPD178024GC Datasheet(HTML) 20 Page - NEC

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µPD178023, 178024
Data Sheet U14126EJ1V0DS00
3.2 Clock Generation Circuit
The instruction execution time can be changed as follows:
• 0.45
µs/0.89 µs/1.78 µs/3.56 µs/7.11 µs (system clock: 4.5-MHz crystal resonator)Note
Figure 3-1. Block Diagram of Clock Generation Circuit
3.3 Timers
Four timer channels are provided.
• Basic timer
: 1 channel
• 8-bit timer/event counter
: 2 channels
• Watchdog timer
: 1 channel
Figure 3-2. Block Diagram of Basic Timer
System
clock
oscillator
X2
X1
STOP
00
00
PCC2 PCC1
Internal bus
Standby
control
circuit
2
fX
2
2
fX
2
3
fX
2
4
fX
Prescaler
Clock to other than
peripheral hardware
Prescaler
fX
CPU clock
(fCPU)
Wait
control
circuit
Processor clock control register (PCC)
PCC0
3
0
Divider circuit
4.5 MHz
INTBTM0



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