TMP91C824
91C824-143
2008-02-20
a. Transmission
In SCLK output mode 8-bit data and a synchronous clock are output on the
TXD0 and SCLK0 pins respectively each time the CPU writes the data to the
transmission buffer. When all data is output, INTES0<ITX0C> will be set to
generate the INTTX0 interrupt.
Figure 3.9.19 Transmitting Operation in I/O Interface Mode (SCLK0 output mode)
In SCLK input mode, 8-bit data is output on the TXD0 pin when the SCLK0
input becomes active after the data has been written to the transmission buffer
by the CPU.
When all data is output, INTES0<ITX0C> will be set to generate INTTX0
interrupt.
Figure 3.9.20 Transmitting Operation in I/O Interface Mode (SCLK0 input mode)
SCLK0input
(<SCLKS>
=
0
Rising edge mode)
SCLK0 input
(<SCLKS>
=
1
Falling edge mode)
Bit0 Bit1
TXD0
ITX0C
(INTTX0
Interrupt request)
Bit5 Bit6
Bit7
Timing to write
transmission data
SCLK0 output
(<SCLKS>=0
Rising edge mode)
Bit0
Bit6 Bit7
Bit1
TXD0
ITX0C
(INTTX0
Interrupt request)
SCLK0 output
(<SCLKS>=1
Falling edge mode)
(Internal clock
timing)