CHAPTER 10 SERIAL INTERFACE FUNCTION
User’s Manual U15195EJ5V0UD
441
Figure 10-16. Block Diagram of Asynchronous Serial Interface 1
Transmit
shift registers
(TXS1, TXSL1)
Asynchronous
serial interface mode
registers 10, 11
(ASIM10, ASIM11)
Asynchronous
serial interface status
registers 1
(ASIS1)
Transmission control
parity addition
Reception buffers 1, L1
(RXB1, RXBL1)
PE1 FE1 OVE1
Receive
shift register
RXD1
TXD1
MOD bit
ASCK1
Reception control
parity check
Selector
Selector
Selector
INTST1
INTSR1
SOT1 flag
BRG1
SIR1 flag
Internal bus
1
16
1
16
Remark
The TXD1, RXD1, and ASCK1 pins function alternately as the SO1, SI1, and SCK1 pins.