參數(shù)資料
型號: μPD780208
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(jī)微控制器
文件頁數(shù): 19/78頁
文件大?。?/td> 406K
代理商: ΜPD780208
m
PD780204, 780205, 780206, 780208
19
5.2 CLOCK GENERATOR CIRCUIT
The clock generator circuit has two kinds of generator circuits: the main system clock and subsystem clock.
The instruction time can be changed.
0.4
m
s/0.8
m
s/1.6
m
s/3.2
m
s/6.4
m
s (with main system clock: 5.0 MHz)
122
m
s (with subsystem clock: 32.768 kHz)
Figure 5-1. Clock Generator Circuit Block Diagram
Table 5-2. Timer/Event Counter Groups and Configurations
16-bit Timer/
Event Counter
8-bit Timer/
Event Counter
Watch
Timer
Watchdog
Timer
Interval timer
1 channel
2 channels
1 channel
1 channel
External event counter
1 channel
2 channels
Timer output
1 output
2 outputs
PWM output
1 output
Pulse width measurement
1 input
Square wave output
1 output
2 outputs
Interrupt Request
1
2
1
1
Test input
1 input
Subsystem
clock generator
circuit
Main system
clock generator
circuit
S
Noise detector
circuit
Pre-scaler
S
S
Pre-scaler
To INTP0
sampling clock
Standby
control
circuit
CPU clock (f
CPU
)
Clock to
hardware peripherals
Watch timer
Clock output circuit
f
XT
f
X
f
XT
2
XT1/P04
XT2
X1
X2
f
X
8
f
X
16
f
X
2
f
X
2
2
f
X
2
3
f
X
2
4
STOP
12
5.3 TIMER/EVENT COUNTER
Five channels of timer/event counters are provided.
16-bit timer/event counter
8-bit timer/event counter
Watch timer
Watchdog timer
: 1 channel
: 2 channels
: 1 channel
: 1 channel
G
F
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