參數(shù)資料
型號: HD40A4358S
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-Series microcomputer
中文描述: 4位HMCS400系列微機
文件頁數(shù): 60/100頁
文件大小: 398K
代理商: HD40A4358S
HD404358 Series
60
Port Mode Register A (PMRA: $004):
Four-bit write-only register that selects D
3
/BUZZ pin function as
shown in figure 44. It is reset to $0 by MCU reset.
Serial Interface
The serial interface serially transfers and receives 8-bit data, and includes the following features.
Multiple transmit clock sources
External clock
Internal prescaler output clock
System clock
Output level control in idle states
Five registers, an octal counter, and a selector are also configured for the serial interface as follows.
Serial data register (SRL: $006, SRU: $007)
Serial mode register (SMR: $005)
Port mode register A (PMRA: $004)
Port mode register C (PMRC: $025)
Miscellaneous register (MIS: $00C)
Octal counter (OC)
Selector
The block diagram of the serial interface is shown in figure 51.
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