參數(shù)資料
型號: HD404458
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系列微機(jī)(4位單片微計算機(jī))
文件頁數(shù): 34/120頁
文件大?。?/td> 692K
代理商: HD404458
HD404459 Series
34
Subactive mode
Interrupt strobe
Direct transfer
completion timing
MCU internal
processing period
Oscillation
stabilization
time
Active mode
T
t
RC
T:
t :
STOP/SBY instruction execution
(Set LSON = 0, DTON = 1)
Interrupt frame length
Oscillation stabilization period
Figure 19 Direct Transition Timing
Stop Mode Cancellation by
STOPC
:
The MCU enters active mode from stop mode by a
STOPC
input 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
(i.e., 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.
MCU Operation Sequence:
See figures 20 to 22 for the MCU operation sequences. It is reset by an
asynchronous RESET input, regardless of its status.
The low-power mode operation sequence is shown in figure 22. With the IE flag cleared and an interrupt
flag set together with its interrupt mask cleared, if a STOP/SBY instruction is executed, the instruction is
cancelled (regarded as an NOP) and the following instruction is executed. Before executing a STOP/SBY
instruction, make sure all interrupt flags are cleared or all interrupts are masked.
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參數(shù)描述
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