CHAPTER 10 SERIAL INTERFACE FUNCTION
User’s Manual U15195EJ5V0UD
459
Figure 10-20. Asynchronous Serial Interface Reception Completion Interrupt Timing
(a) When stop bit length = 1 bit
D0
D1
D2
D6
D7
8 serial clocks
8 serial clocks
Start
Stop
RXD1 (input)
INTSR1 interrupt
Flag in reception
(SIR1)
Parity
(b) When stop bit length = 2 bits
D0
D1
D2
D6
D7
Start
Parity
Stop
RXD1 (input)
INTSR1 interrupt
Flag in reception
(SIR1)
8 serial clocks
8 serial clocks
(c) In 2-frame continuous transmission mode
D0
D1
D1
D5
D6
D7
Start
Start
Parity Stop
Parity
Stop
RXD1 (input)
INTSR1 interrupt
Flag in reception
(SIR1)
1st frame
2nd frame
8 serial clocks
8 serial clocks
Cautions 1. Even if a reception error occurs, be sure to read 2-frame continuous reception buffer
register 1 (RXB1)/receive buffer register 1 (RXBL1). If the RXB1 or RXBL1 register is not
read, an overrun error will occur at the next data reception, and the reception error state will
continue indefinitely.
2. Reception is always performed with a stop bit length of 1 bit. A second stop bit is ignored.
Содержание PD703114
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