CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Serial Interface)

Timing chart

Figure 4.11.7.4 show the asynchronous transfer timing chart.

TXEN

TXTRG(RD)

TXTRG(WR)

Sumpling clock

SOUT

 

 

D0

D1

D2

D3

D4

D5

D6

D7

 

 

(In 8-bit mode/Non parity) Interrupt

(a) Transmit timing

RXEN

RXTRG(RD)

RXTRG(WR)

Sumpling clock

SIN

 

 

D0

D1

D2

D3

D4

D5

D6

D7

 

 

D0

D1

D2

D3

D4

D5

D6

D7

 

 

D0

D1

D2

D3

D4

D5

D6

D7

 

(In 8-bit mode/Non

parity)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TRXD

 

 

 

 

 

 

 

 

 

 

 

 

1st data

 

 

 

 

2st data

 

OER control signal

OER

Interrupt

(b) Receive timing

Fig. 4.11.7.4 Timing chart (asynchronous transfer)

4.11.8 Interrupt function

This serial interface includes a function that generates the below indicated three types of interrupts.

Transmitting complete interrupt

Receiving complete interrupt

Error interrupt

The interrupt factor flag ISxx and the interrupt mask register EISxx for the respective interrupt factors are provided and then the interrupt can be disabled/enabled by the software.

Figure 4.11.8.1 shows the configuration of the serial interface interrupt circuit.

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S1C63558 TECHNICAL MANUAL