71M6521BE Datasheet, PDF (24/97 Pages) Teridian Semiconductor Corporation – Energy Meter IC

Bit
S0CON.7
S0CON.6
S0CON.5
S0CON.4
S0CON.3
S0CON.2
S0CON.1
S0CON.0
Symbol
SM0
SM1
SM20
REN0
TB80
RB80
TI0
RI0
71M6521BE
Energy Meter IC
DATA SHEET
JANUARY 2008
Function
These two bits set the UART0 mode:
Mode
Description
SM0
SM1
0
N/A
0
0
1
8-bit UART
0
1
2
9-bit UART
1
0
3
9-bit UART
1
1
Enables the inter-processor communication feature.
If set, enables serial reception. Cleared by software to disable reception.
The 9^th transmitted data bit in Modes 2 and 3. Set or cleared by the
MPU, depending on the function it performs (parity check, multiprocessor
communication etc.)
In Modes 2 and 3 it is the 9^th data bit received. In Mode 1, if SM20 is 0,
RB80 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 S0CON Bit Functions
Bit
S1CON.7
S1CON.5
S1CON.4
S1CON.3
S1CON.2
S1CON.1
S1CON.0
Symbol
SM
SM21
REN1
TB81
RB81
TI1
RI1
Function
Sets the baud rate for UART1
SM
Mode
Description
Baud Rate
0
A
9-bit UART
variable
1
B
8-bit UART
variable
Enables the inter-processor communication feature.
If set, enables serial reception. Cleared by software to disable reception.
The 9^th transmitted data bit in Mode A. Set or cleared by the MPU,
depending on the function it performs (parity check, multiprocessor
communication etc.)
In Modes A and B, it is the 9^th data bit received. In Mode B, if SM21 is 0,
RB81 is the stop bit. 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 17: The S1CON Bit Functions
Page: 24 of 97
© 2005-2008 TERIDIAN Semiconductor Corporation
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