TMP93CS41 datasheet(187/248 Pages) TOSHIBA

187 / 248 page

TMP93CS40/TMP93CS41

2004-02-10

93CS40-185

Handshake function

Serial channel 0 has a CTS0 pin. Using this pin, data can be sent in units of one

frame; thus, overrun errors can be avoided. The handshake function is

enabled/disabled by SC0MOD<CTSE>.

When the CTS0 pin goes high, after completion of the current data transmission,

data transmission is halted until the CTS0 pin goes low again. When the INTTX0

interrupt is generated, it requests the next data transmission to the CPU.

Although there is no RTS pin, a handshake function can easily be configured by

assigning any port to the RTS function. The RTS output should be high to request

a halt to data transmission after data receive is completed by software in the RXD

interrupt routine.

Figure 3.11.16 Handshake Function

Note 1: If the CTS signal rises during transmission, the next datum is not sent after completion of the current

transmission.

Note 2: Transmission starts at the first falling edge of the TXDCLK clock after the CTS signal falls.

Figure 3.11.17 Timing of CTS (Clear to send)

RXD

RTS

(Any port)

TXD

CTS

TMP93CS40/S41

Sender

Receiver

Send is suspended

from (A) to (B).

Timing to write

to transmission buffer

Bit0

Start bit

SIOCLK

TXDCLK

TXD

CTS

(A).

(B)

TMP93CS41 데이터시트(PDF) 187 Page - Toshiba Semiconductor