Toshiba TLCS-900/H1 Series Manual page 183

3. Transmission and receiving (Full duplex mode)
When full duplex mode is used, set the receive interrupt level to 0, and only set
the interrupt level (from 1 to 6) of the transmit interrupt. Ensure that the
program which transmits the interrupt reads the receiving buffer before setting
the next transmit data.
The following is an example of this:
Example: Channel 0, SCLK output
Baud rate = 9600 bps
fc = 4.9152 MHz
Main routine
7 6
INTES0 X 0
PFCR X X
−
PFFC X
− −
SC0MOD0
−
SC0MOD1 1
− −
SC0CR
BR0CR 0 0
− −
SC0MOD0
SC0BUF
* *
INTTX0 interrupt routine
← SC0BUF
A
CC
SC0BUF * *
X: Don't care, −: No change
*Clock condition: Clock gear 1/1(fc)
5 4 3 2 1 0
0 1 X 0 0 0 Set the INTTX0 level to 1.
Set the INTRX0 level to 0.
X X X 1 0 1 Set PF0, PF1 and PF2 to function as the TXD0,
RXD0 and SCLK0 pins respectively.
X X X 1 0 1
− − − −
0 0 Select I/O interface mode.
X X X X X X Select full duplex mode.
− − − −
0 0 SCLK output, transmit on negative edge, receive
on positive edge.
Baud rate = 9600 bps.
0 1 1 0 0 0
− − − − −
1 Enable receiving.
Set the transmit data and start.
* * * * * *
Read the receiving buffer.
* * * * * * Set the next transmit data.
92CH21-181
TMP92CH21
2009-06-19