參數(shù)資料
型號(hào): UPD178006A
廠商: NEC Corp.
英文描述: DDR2, 25-Bit 1:1 or 14-Bit 1:2 Configurable Registered Buffer
中文描述: 8位單晶片微控制器
文件頁(yè)數(shù): 18/56頁(yè)
文件大?。?/td> 314K
代理商: UPD178006A
18
μ
PD178004A, 178006A, 178016A, 178018A
Figure 5-5. Watchdog Timer Block Diagram
Control
Circuit
8-Bit Counter
Prescaler
INTWDT
Non-Maskable
Interrupt Request
INTWDT
Maskable
Interrupt Request
Reset
Selector
2
f
xx
4
2
f
xx
5
2
f
xx
6
2
f
xx
7
2
f
xx
8
2
f
xx
9
2
f
xx
11
2
f
xx
3
5.4 BUZZER OUTPUT CONTROL CIRCUIT
The clock with the following frequency can be output as a buzzer output.
1.5 kHz/3 kHz/6 kHz (@ 4.5-MHz crystal oscillator with system clock)
Figure 5-6. Buzzer Output Control Circuit Block Diagram
Internal Bus
1.5 kHz
3 kHz
6 kHz
TCL27 TCL26 TCL25
3
PM36
S
Timer Clock Select Register 2
Port Mode Register 3
BEEP/P36
P36
Output Latch
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