參數(shù)資料
型號(hào): HD404628R
廠商: Hitachi,Ltd.
英文描述: AS Microcomputer Incorporating a DTMF Generator Circuit(微計(jì)算機(jī)帶雙音多頻發(fā)生器電路)
中文描述: 由于微機(jī)安裝有雙音多頻發(fā)電機(jī)斷路器(微計(jì)算機(jī)帶雙音多頻發(fā)生器電路)
文件頁數(shù): 38/155頁
文件大小: 549K
代理商: HD404628R
HD404629R Series
38
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 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
Bit
Initial value
Read/Write
Bit name
3
0
W
MIS3
2
0
W
MIS2
0
0
W
MIS0
1
0
W
MIS1
Miscellaneous register (MIS: $00C)
MIS1
0
MIS0
T
*
0
0.24414 ms
t
RC
0.12207 ms
0.24414 ms
7.8125 ms
31.25 ms
Oscillation circuit conditions
External clock input
Ceramic oscillator
Crystal oscillator
0
1
1
1
0
1
15.625 ms
62.5 ms
Not used
Not used
Notes: 1.
2.
Values of T and t
when a 32.768-kHz crystal oscillator is used to pins x1 and x2.
The value is applied only when direct transfer operation is used.
Buffer control.
Refer to figure 41.
MIS3
MIS2
1
*
1
*
2
Figure 18 Miscellaneous Register (MIS)
Subactive mode
Interrupt strobe
Direct transfer
completion timing
MCU internal
processing time
Oscillation
stabilization
time
Active mode
T
T
t
RC
T:
t :
T :
D
STOP/SBY instruction execution
(Set LSON = 0, DTON = 1)
Interrupt frame length
Oscillation stabilization period
Direct transition time
Figure 19 Direct Transition Timing
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