TSC87C51

9

MATRA MHS

Rev. C

Preliminary

Description

Symbol

TB8

Ninth bit to transmit in mode 2 and 3

Set to transmit a logic 1 in the 9th bit.

Clear to transmit a logic 0 in the 9th bit.

RB8

Ninth bit received in mode 2 and 3

Set by hardware if 9th bit received is logic 1.

Clear by hardware if 9th bit received is logic 0.

TI

Transmit Interrupt Flag

Set by hardware at the end of the 8th bit time in mode 0 or at the beginning of the stop bit in the other

modes.

Clear to acknowledge interrupt.

RI

Receive Interrupt Flag

Set by hardware at the end of the 8th bit time in mode 0, see Figure 4 and Figure 5 in the other modes.

Clear to acknowledge interrupt.

The reset value of SCON is 0000 0000b.