參數(shù)資料
型號(hào)： UPD780018YGF-xxx-3BA
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(yè)數(shù)： 18/42頁(yè)
文件大?。?/td> 189K
代理商： UPD780018YGF-XXX-3BA
18
μ
PD780016Y, 780018Y
5.2 Clock Generator
There are two kinds of clock generators: main system and subsystem clock generators.
It is possible to change the instruction execution time.
0.4
μ
s/0.8
μ
s/1.6
μ
s/3.2
μ
s/6.4
μ
s (at main system clock frequency of 5.0 MHz)
122
μ
s (at subsystem clock frequency of 32.768 kHz)
Figure 5-1. Clock Generator Block Diagram
XT1
XT2
X1
X2
STOP
f
XT
f
XX
Watch timer, Clock
output function
Clock to peripheral
hardware
CPU clock
(f
CPU
)
To INTP0
sampling clock
2
f
XX
2
3
f
XX
2
2
f
XX
f
X
f
X
2
Subsystem
clock
oscillator
Main system
clock
oscillator
Division
circuit
Prescaler
Standby
control
circuit
Wait
control
circuit
Prescaler
S
S
f
XT
2
2
4
f
XX
2
1
MCS
Note
Oscillation mode
select register
Type
Function
Note
Be sure to set 1 to MCS.
5.3 Timer/Event Counter
There are the following seven timer/event counter channels:
16-bit timer/event counter
8-bit timer/event counter
Watch timer
Watchdog timer
: 1 channel
: 4 channels
: 1 channel
: 1 channel
Table 5-2. Types and Functions of Timer/Event Counters
16-bit Timer/Event 8-bit Timer/Event
Counter
8-bit Timer/Event
Counters 5, 6
Watch Timer
Watchdog Timer
Counters 1, 2
Interval timer
1 channel
2 channels
2 channels
1 channel
1 channel
External event counter
1 channel
2 channels
2 channels
—
—
Timer output
1 output
2 outputs
2 outputs
—
—
PWM output
1 output
—
2 outputs
—
—
Pulse width measurement
2 inputs
—
—
—
—
Square wave output
1 output
2 outputs
2 outputs
—
—
One-shot pulse output
1 output
—
—
—
—
Interrupt request
2
2
2
1
1
Test input
—
—
—
1 input
—
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