參數(shù)資料
型號(hào)： UPD78045F
廠商： NEC Corp.
元件分類： DC/DC變換器
英文描述： 1 watt dc-dc converters
中文描述： 1瓦的DC - DC轉(zhuǎn)換器
文件頁數(shù)： 18/72頁
文件大?。?/td> 510K
代理商： UPD78045F
18
m
PD78042F, 78043F, 78044F, 78045F
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)
Fig. 5-1 Clock Generator Circuit Block Diagram
Subsystem
clock oscillator
Main system
clock oscillator
Prescaler
S
Prescaler
To INTP0
sampling clock
Standby
control
circuit
CPU clock (f
CPU
)
Clock to
hardware peripherals
Clock output circuit
f
XT
f
X
XT1/P04
XT2
X1
X2
f
X
2
f
X
2
2
f
X
2
3
f
X
2
4
STOP
f
XT
2
2
1
S
Noise
eliminator
S
Watch timer
f
X
8
f
X
16
5.3 TIMER/EVENT COUNTER
Six channels of timer/event counters are provided.
16-bit timer/event counter : 1 channel
8-bit timer/event counter
Watch timer
Watchdog timer
6-bit up/down counter
: 2 channels
: 1 channel
: 1 channel
: 1 channel
Table 5-2 Timer/Event Counter Groups and Configurations
F
G
16-bit timer/
event counter
8-bit timer/
event counter
Watch
timer
Watchdog
timer
6-bit up/
down counter
Interval timer
1 channel
2 channels
1 channel
1 channel
—
External event counter
1 channel
2 channels
—
—
1 channel
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
1
Test input
—
—
1 input
—
—
相關(guān)PDF資料
PDF描述
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