TMP93CS41 datasheet(194/248 Pages) TOSHIBA

194 / 248 page

TMP93CS40/TMP93CS41

2004-02-10

93CS40-192

Main setting

4321

P9CR

← X X − − − − 0 −

Select P91 (RXD0) as the input pin.

SC0MOD

← − 0 1 X 1 0 0 1

Enable receiving in 8-bit UART mode.

SC0CR

← X 0 1 XXX0 0

Set odd parity.

BR0CR

← 0 X 0 1010 1

Set transfer rate at 9600 bps.

TRUN

← 1 X − − − − − −

Start the prescaler for the baud rate generator.

INTES0

← − − − − 1 1 0 0

Enable INTTX0 interrupt and set interrupt level 4.

Interrupt processing

Acc

← SC0CR AND 00011100

if Acc

≠ 0 then ERROR

Check for error.

Acc

← SC0BUF

Read the received data.

X: Don’t care, −: No change

(4) Mode 3 (9-bit UART mode)

9-bit UART mode can be selected by setting SC0MOD<SM1:0> to 11. In this mode, a

parity bit cannot be set.

During transmission, the MSB (9th bit) is written to the serial channel mode register

<TB8>. During receiving it is stored in the serial channel control register <RB8>.

When the buffer is written or read, the MSB is read or written first, then the rest of the

data is read from or written to SC0BUF.

Wakeup function

In 9-bit UART mode, the wakeup function for slave controllers is enabled by

setting SC0MOD<WU> to 1. The interrupt INTRX0 occurs only when<RB8>

= 1.

Note: The TXD pins of the slave controllers must be in open-drain output mode.

Figure 3.11.24 Serial Link Using Wakeup Function

Master

RXD

TXD

Slave 1

RXD

TXD

Slave 2

RXD

TXD

Slave 3

RXD

TXD

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