Datasheet

71M6513/71M6513H
3-Phase Energy Meter IC
DATA SHEET
SEPTEMBER 2011
© 2005-2011 Teridian Semiconductor Corporation Page: 25 of 104
A Maxim Integrated Products Brand
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 15: The S1CON register
Bit Symbol Function
S0CON.7 SM0 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
S0CON
.6
SM1
S0CON.5
SM20
Enables the inter-processor communication feature.
S0CON
.4
REN0
If set, enables serial reception. Cleared by software to disable reception.
S0CON.3 TB80 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.)
S0CON.2 RB80 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
S0CON.1
TI0
Transmit interrupt flag, set by hardware after completion of a serial
transfer. Must be cleared by software.
S0CON.0 RI0 Receive interrupt flag, set by hardware after completion of a serial
reception. Must be cleared by software
Table 16: The S0CON Bit Functions