參數(shù)資料
型號: μPD789177Y
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(shù): 89/145頁
文件大?。?/td> 610K
代理商: ΜPD789177Y
Preliminary Product Information
88
μ
PD789166Y, 789167Y, 789176Y, 789177Y
Figure 5-41. Format of SMB Mode Register 0 (2/2)
TOEN0
Time-out count enable bit
Note
The time-out count is cleared to 0, then count operation is disabled.
0
1
TOCL00
TOCL01
Time-out clock selection bits
f
X
/2
6
0
1
0
1
0
0
1
1
Time-out count operation is enabled.
(78.125 kHz)
f
X
/2
7
(39.063 kHz)
f
X
/2
8
(19.531 kHz)
f
XT
(32.768 kHz)
Note
An interrupt (INTSMBOV0) is generated when the time-out counter overflows. The hardware does not
reset SMB operation. Ensure that SMB operation is reset by software after INTSMBOV0 generation.
Caution
Bits 6 and 7 must be fixed to 0.
Remarks 1.
f
X
: Main system clock oscillation frequency
2.
f
XT
: Subsystem clock oscillation frequency
3.
The parenthesized values apply to operation at f
X
= 5.0 MHz or f
XT
= 32.768 kHz.
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