參數(shù)資料
型號: HD4074654
廠商: Hitachi,Ltd.
英文描述: 4-Bit Single-Chip Microcomputer
中文描述: 4位單片機
文件頁數(shù): 27/109頁
文件大?。?/td> 430K
代理商: HD4074654
HD404654 Series
27
Stop Mode Cancellation by
STOPC
:
The MCU enters active mode from stop mode by inputting
STOPC
as well as by
RESET
. In either case, the MCU starts instruction execution from the starting address
(address 0) of the program. However, the value of the RAM enable flag (RAME: $021, bit 3) differs
between cancellation by
STOPC
and by
RESET
. When stop mode is cancelled by
RESET
, RAME = 0;
when cancelled by
STOPC
, RAME = 1.
RESET
can cancel all modes, but
STOPC
is valid only in stop
mode;
STOPC
input is ignored in other modes. Therefore, when the program requires to confirm that stop
mode has been cancelled by
STOPC
(for example, when the RAM contents before entering stop mode are
used after transition to active mode), execute the TEST instruction on the RAM enable flag (RAME) at the
beginning of the program.
Stop mode
Oscillator
Internal
clock
STOP instruction execution
t
res
t
RC
(stabilization period)
t
res
STOPC
or
RESET
Figure 13 Timing of Stop Mode Cancellation
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相關代理商/技術參數(shù)
參數(shù)描述
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