參數資料
型號: μPD789167Y
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8 位單片微控制器)
中文描述: 8位單片機微控制器(8位單片微控制器)
文件頁數: 107/145頁
文件大?。?/td> 610K
代理商: ΜPD789167Y
Preliminary Product Information
106
μ
PD789166Y, 789167Y, 789176Y, 789177Y
7.2
Standby Function Control Register
The oscillation settling time selection register (OSTS) is used to control the wait time, from the time STOP mode is
deselected by an interrupt request, until oscillation settles.
The OSTS is manipulated using an 8-bit memory manipulation instruction.
A RESET input loads 04H into the OSTS. If a RESET input is used to deselect STOP mode, the time required for
oscillation to settle will be 2
15
/f
X
, rather than 2
17
/f
X
.
Figure 7-1. Format of Oscillation Settling Time Selection Register
OSTS2 OSTS1 OSTS0
OSTS
Symbol
Address
When reset
R/W
FFFAH
04H
R/W
7
6
5
4
3
2
1
0
Oscillation settling time selection
OSTS2
0
0
1
OSTS1
0
1
0
0
0
0
0
OSTS0
0
0
0
2
12
/fx
2
15
/fx
2
17
/fx
Not to be set
(819 s)
(6.55 ms)
(26.2 ms)
Other settings
0
Caution
The wait time required to deselect STOP mode does not include the time (“a” in the following
figure) required for the clock oscillation to settle after STOP mode is deselected, regardless of
whether STOP mode is deselected by a RESET input or interrupt.
STOP mode release
X1 pin voltage
waveform
V
SS
a
Remarks 1.
f
X
: Main system clock oscillation frequency
2.
The parenthesized values apply to operation at f
X
= 5.0 MHz.
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