71M6511 Datasheet, PDF (23/95 Pages) Teridian Semiconductor Corporation – Single-Phase Energy Meter IC

71M6511/71M6511H
Single-Phase Energy Meter IC
DATA SHEET
AUGUST 2007
Serial Interface 1 Control Register (S1CON).
The function of the serial port depends on the setting of the Serial Port Control Register S1CON.
MSB
LSB
SM
-
SM21 REN1 TB81 RB81
TI1
RI1
Table 16: The S1CON register
Bit
Symbol
S0CON.7
SM0
S0CON.6
SM1
S0CON.5
S0CON.4
S0CON.3
SM20
REN0
TB80
S0CON.2
RB80
S0CON.1
TI0
S0CON.0
RI0
Function
These two bits set the UART0 mode:
Mode
Description
SM0
0
N/A
0
SM1
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 17: The S0CON Bit Functions
Note: The speed in Mode 2 depends on the SMOD bit in the SFR PCON. See the PCON register description.
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