Operation Of Uart2, Uart3 - Fujitsu MB90390 Series Hardware Manual

CHAPTER 20 UART2, UART3
20.7

Operation of UART2, UART3

UART2, UART3 operates in operation mode 0 for normal bidirectional serial
communication, in mode 2 and 3 in bidirectional communication as master or slave, and
in mode 1 as master or slave in multiprocessor communication.
■ Operation of UART2, UART3
●
Operation modes
There are four UART2, UART3 operation modes: modes 0 to 3. As listed in Table 20.7-1, an operation
mode can be selected according to the communication method.
Table 20.7-1 UART2, UART3 Operation Mode
Operation mode
0 normal mode
1 multiprocessor
2 normal mode
3 LIN mode
*1: means the data bit transfer format: LSB first or MSB first
*2: "+1" means the indicator bit of the address/data selection in the multiprocessor mode, instead of
parity.
Note:
Mode 1 operation is supported both for master or slave operation of UART2, UART3 in a master/
slave connection system. In Mode 3 the UART2, UART3 function is locked to 8N1-Format, LSB first.
If the mode is changed, UART2, UART3 cuts off all possible transmission or reception and awaits
then new action.
380
Data length
parity parity
disabled enabled
7 bits or 8 bits
7 bits or 8 bits
-
*2
+ 1
8 bits
8 bits -
Length
Synchronization
of stop
of mode
bit
asynchronous 1 or 2
asynchronous 1 or 2
synchronous 0, 1 or 2
asynchronous
data bit
direction
*1
L/M
L/M
L/M
1 L