參數(shù)資料
型號: μPD789198
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): 86/146頁
文件大小: 630K
代理商: ΜPD789198
Preliminary Product Information
86
μ
PD789186, 789187, 789196, 789197
(c) SMB clock selection register 0 (SMBCL0)
This register sets the SMB transmission clock.
SMBCL0 is manipulated using a 1-bit or 8-bit memory manipulation instruction.
A RESET input clears SMBCL0 to 00H.
Figure 6-40. SMB Clock Selection Register 0 Format (1/2)
0
0
CLD0 DAD0 SMC0 DFC0 CL01 CL00
SMBCL0
Symbol
Address
When reset
R/W
FF7AH
00H
R/W
Note 1
6
5
4
3
2
1
CLD0
0
1
Clear conditions (CLD0 = 0)
Cleared when SCL0 line is low level.
Cleared when SMBE0 = 0.
Cleared by RESET input.
Set conditions (CLD0 = 1)
Set when SCL0 line is high level.
SCL0 line level detection (valid only when SMBE0 = 1)
Detects when SCL0 line is low level.
Detects when SCL0 line is high level.
7
0
DAD0
0
1
Clear conditions (DAD0 = 0)
Cleared when SDA0 line is low level.
Cleared when SMBE0 = 0.
Cleared by RESET input.
Set conditions (DAD0 = 1)
Set when SDA0 line is high level.
SDA0 line level detection (valid only when SMBE0 = 1)
Detects when SDA0 line is low level.
Detects when SDA0 line is high level.
SMC0
0
1
Clear conditions (SMC0 = 0)
Cleared with instruction.
Cleared by RESET input.
Set conditions (SMC0 = 1)
Set with instruction
Operating mode switching
IIC standard mode or SMB mode operation
IIC high-speed mode
DFC0
0
1
Digital filter operation control
Note 2
Digital filter OFF
Digital filter ON
Notes 1.
Bits 4 and 5 are read-only bits.
2.
The digital filter can be used in the high-speed mode. When used in the high-speed mode, the digital
filter provides a slower response.
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