參數(shù)資料
型號: HD4074618TF
廠商: Hitachi,Ltd.
英文描述: 4-Bit Single-Chip Microcomputer
中文描述: 4位單片機
文件頁數(shù): 52/89頁
文件大?。?/td> 358K
代理商: HD4074618TF
HD404618 Series
52
A write signal input to the serial mode register discontinues the input of the transmit clock to the serial data
register and octal counter. Therefore, if a write is performed during data transmission, the octal counter is
reset to 000 to stop transmission, and at the same time, the serial interrupt request flag is set.
Write operations are valid from the second instruction execution cycle, so the STS instruction must be
executed after at least two cycles have been executed. The serial mode register is initialized to $0 by MCU
reset.
Table 25 Serial Mode Register
SMR
Bit 3
R0
0
/
SCK
Pin
R0
0
port input/output pin
SCK
input/output pin
0
1
SMR
Transmit Clock
R0
0
/
SCK
Pin
Bit 2
Bit 1
Bit 0
Clock Source
Prescaler
Division Ratio
System Clock
Division Ratio
0
0
0
SCK
output
SCK
output
SCK
output
SCK
output
SCK
output
SCK
output
SCK
output
SCK
input
Prescaler
÷
2048
÷
512
÷
128
÷
32
÷
8
÷
2
÷
4096
÷
1024
÷
256
÷
64
÷
16
÷
4
÷
1
0
0
1
Prescaler
0
1
0
Prescaler
0
1
1
Prescaler
1
0
0
Prescaler
1
0
1
Prescaler
1
1
0
System clock
1
1
1
External clock
PMRA3 PMRA2 PMRA1
PMRA: $004
SMR3
SMR2
SMR1
SMR0
SMR: $005
R0 /SO pin mode selection
Transmit clock selection
R0 /
SCK
pin mode selection
R0 /SI pin mode selection
PMRA0
Figure 31 Configurations and Functions of the Mode Registers
相關PDF資料
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相關代理商/技術參數(shù)
參數(shù)描述
HD4074629 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:AS Microcomputer Incorporating a DTMF Generator Circuit
HD4074629F 制造商:Renesas Electronics Corporation 功能描述:
HD4074629FS 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD4074629H 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD4074629TF 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller