參數(shù)資料
型號: HD4074094
廠商: Hitachi,Ltd.
英文描述: 4-Bit Single-Chip Microcomputer(4位單片微計算機)
中文描述: 4位單片機(4位單片微計算機)
文件頁數(shù): 71/101頁
文件大小: 610K
代理商: HD4074094
HD404054 Series/HD404094 Series
71
Registers for Serial Interface
The serial interface operation is selected, and 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 53).
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 (SM1A: $005) 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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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD4074094H 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD4074094S 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:microcomputer designed to increase program productivity
HD4074224FP01 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD4074224FP02 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:CMOS 4-bit Single-Chip Microcomputers with the same architecture as the HMCS400 Series
HD4074224FP03 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:CMOS 4-bit Single-Chip Microcomputers with the same architecture as the HMCS400 Series