Serial Channel - Toshiba TMP91C815F Data Book

3.9 Serial Channels
TMP91C815 includes 2 serial I/O channels. For both channels either UART Mode (asynchronous
transmission) or I/O Interface Mode (synchronous transmission) can be selected.
• I/O Interface Mode
• UART Mode
In Mode 1 and Mode 2 a parity bit can be added. Mode 3 has a wake-up function for making the master
controller start slave controllers via a serial link (a multi-controller system).
Figure 3.9 2, 3 are block diagrams for each channel.
Serial Channels 0 and 1 can be used independently.
Both channels operate in the same fashion except for the following points; hence only the operation of Channel
0 is explained below.
Pin Name
IrDA Mode
This chapter contains the following sections:
3.9.1
3.9.2
3.9.3
3.9.4
3.9.5
Mode 0:
Mode 1:
Mode 2:
Mode 3:
Table 3.9.1 Differences between Channels 0 to 1
Channel 0
TXD0 (PC0)
RXD0 (PC1)
CTS /SCLK0 (PC2) 0
Yes
Block diagram
Operation of each circuit
SFRs
Operation in each mode
Support for IrDA Mode
91C815-120
For transmitting and receiving I/O data using the
synchronizing signal SCLK for extending I/O.
7-bit data
8-bit data
9-bit data
Channel 1
TXD1 (PC3)
RXD1 (PC4)
CTS1 /SCLK1 (PC5)
No
TMP91C815