參數(shù)資料
型號: μPD789166Y
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(jī)微控制器(8位單片微控制器)
文件頁數(shù): 79/145頁
文件大?。?/td> 610K
代理商: ΜPD789166Y
Preliminary Product Information
78
μ
PD789166Y, 789167Y, 789176Y, 789177Y
Figure 5-38. Format of SMB Control Register 0 (1/4)
SMBE0
LREL0
WREL0
SPIE0
WTIM0
ACKE0
STT0
SPT0
SMBC0
Symbol
Address
When reset
R/W
FF78H
00H
R/W
6
5
4
3
2
1
SMBE0
0
1
Clear conditions (SMBE0 = 0)
Cleared with instruction
Cleared by RESET input
Set conditions (SMBE0 = 1)
Set with instruction
SMB operation
Operation disabled. Presets extension register (SMBS0). Internal operation also disabled.
Operation enabled
7
0
LREL0
0
1
The standby status continues until the following communication participation conditions are met.
Startup as master after detection of stop condition
Matching addresses or extension code reception after start condition
Clear conditions (LREL0 = 0)
Note
Automatically cleared after execution
Cleared by RESET input
Set conditions (LREL0 = 1)
Set with instruction
Escape from transmission
Normal operation
Escapes from the current transmission and enters the standby status. Automatically cleared
after execution.
This bit is used when extension codes not relevant to the local station are received.
The SCL0 and SDA0 lines enter the high impedance status.
The following flags are cleared.
STD0 STT0 SPT0 ACKD0 TRC0 COI0 EXC0 MSTS0
WREL0
0
1
Clear conditions (WREL0 = 0)
Note
Automatically cleared after execution
Cleared by RESET input
Set conditions (WREL0 = 1)
Set with instruction
Wait cancel
Does not cancel wait.
Cancels wait. Automatically cleared after wait cancellation.
SPIE0
0
1
Clear conditions (SPIE0 = 0)
Note
Cleared with instruction
Cleared by RESET input
Set conditions (SPIE0 = 1)
Set with instruction
Interrupt request generation at stop condition detection
Disabled
Enabled
Note
This flag's signals are made invalid by setting SMBE0 = 0.
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