參數(shù)資料
型號: HD404652
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): 73/109頁
文件大?。?/td> 430K
代理商: HD404652
HD404654 Series
73
Registers for Serial Interface 1
When serial interface 1 operation is selected, serial data is read and written by the following registers.
Serial mode register 1A (SM1A: $005)
Serial mode register 1B (SM1B: $028)
Serial data register 1 (SR1L: $006, SR1U: $007)
Port mode register A (PMRA: $004)
Miscellaneous register (MIS: $00C)
Serial Mode Register 1A (SM1A: $005):
This register has the following functions (figure 56).
R4
1
/
SCK
1
pin function selection
Serial interface 1 transmit clock selection
Serial interface 1 prescaler division ratio selection
Serial interface 1 initialization
Serial mode register 1A is a 4-bit write-only register. It is reset to $0 by MCU reset.
A write signal input to serial mode register 1A (SM1A: $005) discontinues the input of the transmit clock
to serial data register 1 (SR1L: $006, SR1U: $007) and the octal counter, and the octal counter is reset to
000. Therefore, if a write is performed during data transfer, the serial 1 interrupt request flag (IFS1: $003,
bit 2) is set.
Written data is valid from the second instruction execution cycle after the write operation, so the STS
instruction must be executed at least two cycles after that.
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HD404652H RES T 0.2E 5W 1%
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相關代理商/技術參數(shù)
參數(shù)描述
HD404652H 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer
HD404652S 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer
HD404654 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer
HD404654H 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer
HD404654S 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer