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參數資料
| 型號： | HD404638R |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | 4-Bit Single-Chip Microcomputer(4位單片微計算機) |
| 中文描述： | 4位單片機（4位單片微計算機） |
| 文件頁數： | 32/133頁 |
| 文件大小： | 803K |
| 代理商： | HD404638R |
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HD404639R Series
32
Direct Transition from Subactive Mode to Active Mode:
Available by controlling the direct transfer on
flag (DTON: $020, bit 3) and the low speed on flag (LSON: $020, bit 0). The procedures are described
below:
Set LSON to 0 and DTON to 1 in subactive mode.
Execute the STOP or SBY instruction.
The MCU automatically enters active mode from subactive mode after waiting for the MCU internal
processing time and oscillation stabilization time (figure 19).
Notes: 1. The DTON flag ($020, bit 3) can be set only in subactive mode. It is always reset in active
mode.
2. The transition time (T
D
) from subactive mode to active mode:
t
RC
< T
D
< T + t
RC
Subactive mode
Interrupt strobe
Direct transfer
completion timing
MCU internal
processing period
Oscillation
stabilization
time
Active mode
T
t
RC
T:
t
:
T
D
:
STOP/SBY instruction execution
(Set LSON = 0, DTON = 1)
Interrupt frame length
Oscillation stabilization period
Transition time
T
D
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
(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.
MCU Operation Sequence:
The MCU operates in the sequences shown in figures 20 to 22. 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
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相關代理商/技術參數 |
參數描述 |
|---|---|
| HD404638RF | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller |
| HD404639R | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer |
| HD404639RF | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer |
| HD404639RSERIES | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| HD404652 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer |
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