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UPD784021 Datasheet(PDF) 49 Page - Renesas Technology Corp

Part # UPD784021
Description  MOS INTEGRATED CIRCUIT
PDF  92 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

UPD784021 Datasheet(HTML) 49 Page - Renesas Technology Corp

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mPD784020, 784021
9.5
EXAMPLES OF MACRO SERVICE APPLICATIONS
(1) Serial interface transmission
Each time a macro service request (INTST) is generated, the next transmission data is transferred from memory
to TXS. When data n (last byte) has been transferred to TXS (that is, once the transmission data storage buffer
becomes empty), a vectored interrupt request (INTST) is generated.
(2) Serial interface reception
Each time a macro service request (INTSR) is generated, reception data is transferred from RXB to memory.
When data n (last byte) has been transferred to memory (that is, once the reception data storage buffer becomes
full), a vectored interrupt request (INTSR) is generated.
Transmission data storage buffer (memory)
INTST
TXS (SFR)
TxD
Data n
Data n-1
Data 2
Data 1
Internal bus
Transmission
shift register
Transmission control
Reception data storage buffer (memory)
INTSR
RXB (SFR)
RxD
Data n
Data n-1
Data 2
Data 1
Internal bus
Reception buffer
Reception
shift register
Reception control



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