參數(shù)資料
型號: UPD178076GF
廠商: NEC Corp.
元件分類: 8位微控制器
英文描述: 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
中文描述: 8位微控制器與2/4/8K字節(jié)在系統(tǒng)可編程閃存
文件頁數(shù): 22/72頁
文件大?。?/td> 366K
代理商: UPD178076GF
22
μ
PD178076, 178078, 178096, 178098
Data Sheet U12885EJ3V0DS00
3.2 Clock Generation Circuit
The instruction execution time can be changed as follows:
0.32
μ
s/0.64
μ
s/1.27
μ
s/2.54
μ
s/5.08
μ
s (system clock: 6.3-MHz crystal resonator)
0.44
μ
s/0.89
μ
s/1.78
μ
s/3.56
μ
s/7.11
μ
s (system clock: 4.5-MHz crystal resonator)
Note
Note
When using the IEBus controller of the
μ
PD178096 and 178098, the 4.5-MHz crystal resonator cannot
be used. Use the 6.3-MHz crystal resonator.
Figure 3-1. Block Diagram of Clock Generation Circuit
X1
X2
System
clock
oscillator
STOP
Internal bus
0
0
0
0
0
PCC2 PCC1 PCC0
3
f
X
2
f
X
2
2
f
X
2
3
f
X
2
4
f
X
Prescaler
S
Standby
control
circuit
Wait
control
circuit
Prescaler
Processor clock control register (PCC)
Clock to other than
peripheral hardware
CPU clock
(f
CPU
)
3.3 Timers
Five timer channels are provided.
Basic timer
16-bit timer/event counter : 1 channel
8-bit timer/event counter
Watchdog timer
: 1 channel
: 2 channels
: 1 channel
Figure 3-2. Block Diagram of Basic Timer
Divider circuit
6.3 MHz or
4.5 MHz
Note
INTBTM0
Note
When using the IEBus controller of the
μ
PD178096 and 178098, the 4.5-MHz crystal resonator cannot
be used. Use the 6.3-MHz crystal resonator.
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