參數(shù)資料
型號: μPD78064B
廠商: NEC Corp.
元件分類: 8位微控制器
英文描述: 8 Bit Single Chip Microcontrollers
中文描述: 8位單片機微控制器
文件頁數(shù): 19/64頁
文件大小: 391K
代理商: ΜPD78064B
19
μ
PD78064B
5.2
Clock Generator
There are two kinds of clocks, main system clock and subsystem clock.
The instruction execution time can also be changed.
0.4
μ
s/0.8
μ
s/1.6
μ
s/3.2
μ
s/6.4
μ
s/12.8
μ
s (@ 5.0-MHz operation with main system clock)
122
μ
s (@ 32.768-kHz operation with subsystem clock)
Figure 5-1. Clock Generator Block Diagram
5.3
Timer/Event Counter
Five timer/event counter channels are incorporated.
16-bit timer/event counter
8-bit timer/event counter
Watch timer
Watchdog timer
: 1 channel
: 2 channels
: 1 channel
: 1 channel
Table 5-2. Timer/Event Counter Types and Functions
16-bit Timer/
Event Counter
8-bit Timer/
Event Counter
Watch Timer
Watchdog Timer
Type
Interval timer
1 channel
2 channels
1 channel
1 channel
External event counter
1 channel
2 channels
Function
Timer output
1 output
2 outputs
PWM output
1 output
Pulse width measurement
2 inputs
Square wave output
1 output
2 outputs
One-shot pulse output
1 output
Interrupt request
2
2
1
1
Test input
1 input
X1
X2
XT1/P07
XT2
f
XT
f
XX
2
f
XX
2
2
f
XX
2
3
f
XX
2
4
f
XT
2
f
X
2
STOP
f
X
CPU
Clock
(f
CPU
)
Subsystem
Clock
Oscillator
Main
System
Clock
Oscillator
Scaler
Selec-
tor
Prescaler
Prescaler
Standby
Control
Circuit
Selec-
tor
Watch Timer
Clock Output
Function
Clock to
Peripheral
Hardware
To INTP0
Sampling Clock
f
XX
1/2
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