HD404369 Datasheet, PDF(75/117 Page) Hitachi Semiconductor

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HD404369 Datasheet, PDF (75/117 Pages) Hitachi Semiconductor – 4-bit HMCS400-Series microcomputer

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HD404369 Series

Serial Interface

The serial interface serially transfers and receives 8-bit data, and includes the following features.

â¢ Multiple transmit clock sources

ï£§ External clock

ï£§ Internal prescaler output clock

ï£§ System clock

â¢ Output level control in idle states

Four registers, an octal counter, and a selector are also configured for the serial interface as follows.

ï£§ Serial data register (SRL: $006, SRU: $007)

ï£§ Serial mode register (SMR: $005)

ï£§ Port mode register A (PMRA: $004)

ï£§ Port mode register C (PMRC: $025)

ï£§ Miscellaneous register (MIS: $00C)

ï£§ Octal counter (OC)

ï£§ Selector

The block diagram of the serial interface is shown in figure 58.

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