參數(shù)資料
型號: HD404324
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-series microcomputer(4位單片微計算機(jī))
中文描述: 4位HMCS400系列微電腦(4位單片微計算機(jī))
文件頁數(shù): 26/94頁
文件大?。?/td> 573K
代理商: HD404324
HD404328 Series
26
Operating Modes
The MCU has five operating modes that are specified by how the clock is used. The functions available in
each mode are listed in table 19, and operations are shown in table 20. Transitions between operating
modes are shown in figure 10.
Table 19
Functions Available in Each Operating Mode
Mode Name
Active
Standby
Stop
Watch
Subactive
*
4
INT
or timer
A interrupt
request from
watch mode
Activation method
RESET
cancellation,
interrupt
request
SBY
instruction
TMA3 = 0
STOP
instruction
TMA3 = 1
STOP
instruction
Status
System
oscillator
OP
OP
Stopped
Stopped
Stopped
Subsystem
oscillator
OP
OP
*
1
OP
OP
OP
Instruction
execution
(
CPU
)
Interrupt
function
interrupt (
PER
)
Clock function
interrupt (
CLK
)
RAM
OP
Stopped
Stopped
Stopped
OP
OP
OP
Stopped
Stopped
*
5
OP
OP
OP
Stopped
*
2
OP
*
2
OP
OP
Retained
Retained
Retained
OP
Registers/flags OP
Retained
Reset
*
6
Retained
Retained/
operating
I/O
OP
Retained
Reset
*
3
Retained
OP
Cancellation method
RESET input,
STOP/SBY
instruction
RESET input
interrupt
request
RESET input
RESET input,
INT
or timer
A interrupt
request
RESET input,
STOP/SBY
instruction
Notes: OP: indicates in operation
1. To reduce current dissipation, stop all oscillation in external circuits.
2. Refer to the Interrupt Frame section for details.
3. Output pins are at high impedance.
4. Subactive mode is an optional function; specify it on the function option list.
5. The A/D converter does not operate.
6. Port mode register B retains the contents it had in active mode.
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