Serial Channel - Toshiba TLCS-90 Series Data Book

TOSHIBA
TMP90C840
3.8 Serial Channel
The TMP90C840 incorporates a serial I/O channel for full-duplex
asynchronous transmission (UART) and I/O expansion.
The serial channel has the following operating modes:
o I/O interface mode --- Mode 0: Transmit/receive I/O data for
expand I/O and transmit its
synchronous signals (SCLK)
o Asynchronous transmission (UART) mode
/ / Mode 1 7-bit data
---------/-- Mode 2 8-bit data
/ Mode 3 9-bit data
The Mode 1 and Mode 2 allow the addition of a parity bit. The Mode 3
accommodates a wake-up function to start the slave controllers in a
controller serial link (multi-controller system).
Fig. 3.8
(1)
shows the data format (I-frame data) in each mode.
· Mode 0 (I/O Interface Model
~ Transfer direction
• Mode 1
• Mode 2 (8-bit UART Mode)
• Mode
\ I
When Bit 8
=
Address (select code) is denoted.
When Bit 8
=
0 Data.is denoted.
Fig. 3.8 (1) Data Formats
MPU90-109
(Wake up)