參數(shù)資料
型號: HD404448
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-Series microcomputer(4位單片微計(jì)算機(jī))
中文描述: 4位HMCS400系列微機(jī)(4位單片微計(jì)算機(jī))
文件頁數(shù): 27/123頁
文件大?。?/td> 726K
代理商: HD404448
HD404449 Series
27
Operating Modes
The MCU has five operating modes as shown in table 19. The operations in each mode are listed in tables
20 and 21. Transitions between operating modes are shown in figure 14.
Active Mode:
All MCU functions operate according to the clock generated by the system oscillators OSC
1
and OSC
2
.
Table 19
Operating Modes and Clock Status
Mode Name
Active
Standby
Stop
Watch
Subactive
*
2
INT
or timer A
interrupt request
from watch
mode
Activation method
RESET
cancellation,
interrupt
request,
STOPC
cancellation in
stop mode,
STOP/SBY
instruction in
subactive mode
(when direct
transfer is
selected)
SBY instruction
STOP
instruction when
TMA3 = 0
STOP
instruction when
TMA3 = 1
Status System
oscillator
OP
OP
Stopped
Stopped
Stopped
Subsystem
oscillator
OP
OP
OP
*
1
OP
OP
Cancellation
method
RESET input,
STOP/SBY
instruction
RESET input,
interrupt request
RESET input,
STOPC
input in
stop mode
RESET input,
INT
or timer A
interrupt request
RESET input,
STOP/SBY
instruction
Note:
OP implies in operation
1. Operating or stopping the oscillator can be selected by setting bit 3 of the system clock select
register (SSR: $029).
2. Subactive mode is an optional function; specify it on the function option list.
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