71m6403 Teridian Semiconductor Corporation, 71m6403 Datasheet - Page 23

• Manufacturer Part Number: 71m6403
• Description: Electronic Trip Unit
• Manufacturer: Teridian Semiconductor Corporation

Page: 23 of 75
Bit
S1CON.7
S1CON.5
S1CON.4
S1CON.3
S1CON.2
S1CON.1
S1CON.0
Symbol
SM21
REN1
RB81
TB81
RI1
SM
TI1
Function
Sets the baud rate for UART1
Enables the inter-processor communication feature.
If set, enables serial reception. Cleared by software to disable reception.
The 9
depending on the function it performs (parity check, multiprocessor
communication etc.)
In Modes 2 and 3, it is the 9
rb81 is the stop bit. In Mode 0 this bit is not used. Must be cleared by
software.
Transmit interrupt flag, set by hardware after completion of a serial
transfer. Must be cleared by software.
Receive interrupt flag, set by hardware after completion of a serial
reception. Must be cleared by software.
Table 16: The S1CON Bit Functions
SM
0
1
©
th
2006 TERIDIAN Semiconductor Corporation
transmitted data bit in Mode A. Set or cleared by the MPU,
Mode
A
B
Description
9-bit UART
8-bit UART
th
data bit received. In Mode B, if sm21 is 0,
Electronic Trip Unit
Baud Rate
variable
variable
71M6403
SEPTEMBER 2006
REV 1.0