參數(shù)資料
型號: HD4074449
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-Series microcomputer(4位單片微計算機)
中文描述: 4位HMCS400系列微機(4位單片微計算機)
文件頁數(shù): 28/123頁
文件大小: 726K
代理商: HD4074449
HD404449 Series
28
Table 20
Operations in Low-Power Dissipation Modes
Function
Stop Mode
Watch Mode
Standby Mode
Subactive Mode
*
2
CPU
Reset
Retained
Retained
OP
RAM
Retained
Retained
Retained
OP
Timer A
Reset
OP
OP
OP
Timer B
Reset
Stopped
OP
OP
Timer C
Reset
Stopped
OP
OP
Timer D
Reset
Stopped
OP
OP
Serial 1, 2
Reset
Stopped
*
3
OP
OP
A/D
Reset
Stopped
OP
Stopped
I/O
Note:
Reset
*
1
Retained
Retained
OP
OP implies in operation
1. Output pins are at high impedance.
2. Subactive mode is an optional function specified on the function option list.
3. Transmission/reception is activated if a clock is input in external clock mode. However, all
interrupts stop.
Table 21
I/O Status in Low-Power Dissipation Modes
Output
Input
Standby mode,
watch mode
Stop mode
Active mode,
subactive mode
D
0
–D
11
D
12
–D
13
R0–RC
Retained
High impedance
Input enabled
Input enabled
Retained or output of
peripheral functions
High impedance
Input enabled
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