參數(shù)資料
型號(hào): UPD178018AGC
廠商: NEC Corp.
元件分類(lèi): 8位微控制器
英文描述: 8-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 8位單晶片微控制器
文件頁(yè)數(shù): 16/56頁(yè)
文件大小: 314K
代理商: UPD178018AGC
16
μ
PD178004A, 178006A, 178016A, 178018A
5.2 CLOCK GENERATOR
The instruction execution time can be changed as follows.
0.44
μ
s/0.88
μ
s/1.78
μ
s/3.56
μ
s/7.11
μ
s/14.22
μ
s (@ 4.5-MHz crystal oscillator with system clock.)
Figure 5-1. Clock Generator Block Diagram
X1
X2
f
XX
Prescaler
System
Clock
Oscillator
Clock to peripheral
hardware other than
the above.
Clock to the PLL
frequency synthesizer,
basic timer and buzzer
output control circuit.
CPU Clock
(f
CPU
)
Standby
Control
Circuit
Wait Control
Circuit
To INTP0
Sampling Clock
2
f
XX
2
2
f
XX
2
3
f
XX
2
4
f
XX
Prescaler
Selector
Selector
f
X
2
f
X
STOP
Scaler
5.3 TIMER
The
μ
PD178004A, 178006A, 178016A, and 178018A incorporate 5 channels of the timer.
Basic timer
: 1 channel
8-bit timer/event counter
: 2 channels
8-bit timer (D/A converter)
Note
: 1 channel
Watchdog timer
: 1 channel
Note
Used is shared with the 8/9-bit resolution
×
3-channel D/A converter (PWM output).
Figure 5-2. Basic Timer Block Diagram
Divider
4.5 MHz
INTTMC
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