CHAPTER 9 WATCHDOG TIMER
User’s Manual U13850EJ4V0UM
243
9.5 Standby Function Control Register
The wait time from releasing the stop mode until the oscillation stabilizes is controlled by the oscillation
stabilization time selection register (OSTS).
OSTS is set by an 8-bit memory manipulation instruction.
RESET input sets OSTS to 04H.
Figure 9-5. Oscillation Stabilization Time Selection Register (OSTS)
After reset: 04H
R/W
Address: FFFFF380H
7
6
5
4
3
2
1
0
OSTS
0
0
0
0
0
OSTS2
OSTS1
OSTS0
Oscillation stabilization time selection
f
XX
OSTS2
OSTS1
OSTS0
Clock
20 MHz
Note
12.58 MHz
0
0
0
2
14
/f
XX
819.2
µ
s
1.3 ms
0
0
1
2
16
/f
XX
3.3 ms
5.2 ms
0
1
0
2
17
/f
XX
6.6 ms
10.4 ms
0
1
1
2
18
/f
XX
13.1 ms
20.8 ms
1
0
0
2
19
/f
XX
(after reset)
26.2 ms
41.6 ms
Other than above
Setting prohibited
Note
Only for the V850/SB1.
Caution The wait time at the release of the STOP mode does not include the time (a in the figure below)
until clock oscillation starts after releasing the STOP mode when RESET is input or an interrupt
is generated.
Vss
STOP mode release
a
Voltage
waveform
at X1 pin
Содержание MPD703030A
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