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HD404374 Datasheet, PDF (89/161 Pages) Renesas Technology Corp – Low-Voltage AS Microcomputers with On-Chip A/D Converter | |||
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HD404374/HD404384/HD404389/HD404082/HD404084 Series
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 multiplexer are also configured for the serial interface as follows.
⢠Serial data register (SRL: $026, SRU: $027)
⢠Serial mode register 1 (SMR1: $024)
⢠Serial mode register 2 (SMR2: $025)
⢠Port mode register 3 (PMR3: $00B)
⢠Octal counter (OC)
⢠Selector
The block diagram of the serial interface is shown in figure 52.
Rev.5.00, Sep.11.2003, page 89 of 161
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