71M6513 Maxim, 71M6513 Datasheet - Page 24

• Manufacturer Part Number: 71M6513
• Description: The 71M6513 and 71M6513H are highly integrated SoCs with an MPU core, RTC, flash, and LCD driver
• Manufacturer: Maxim

WDCON[7] selects whether timer 1 or the internal baud rate generator is used. All UART transfers are programmable for parity
enable, parity, 2 stop bits/1 stop bit and XON/XOFF options for variable communication baud rates from 300 to 38400 bps.
Table 12 shows how the baud rates are calculated. Table 13 shows the selectable UART operation modes.
Note: S0REL and S1REL are 10-bit values derived by combining bits from the respective timer reload registers. SMOD is the
SMOD bit in the SFR PCON. TH1 is the high byte of timer 1.
Note: Parity of serial data is available through the P flag of the accumulator. Seven-bit serial modes with parity, such as those
used by the FLAG protocol, can be simulated by setting and reading bit 7 of 8-bit output data. Seven-bit serial modes without
parity can be simulated by setting bit 7 to a constant 1. 8-bit serial modes with parity can be simulated by setting and reading
the 9
(S1CON.2) for receive operations. SM20 (S0CON.5) and SM21 (S1CON.5) can be used as handshake signals for inter-processor
communication in multi-processor systems.
Serial Interface 0 Control Register (S0CON).
The function of the UART0 depends on the setting of the Serial Port Control Register S0CON.
Page: 24 of 104
th
bit, using the control bits TB80 (S0CON.3) and TB81 (S1CON.3) in the S0CON and S1CON SFRs for transmit and RB81
Serial Interface 0
Serial Interface 1
A Maxim Integrated Products Brand
Mode 0
Mode 1
Mode 2
Mode 3
MSB
SM0
Start bit, 8 data bits, parity, stop bit,
Start bit, 8 data bits, parity, stop bit,
SM1
variable baud rate (internal baud
variable baud rate (internal baud
fixed baud rate 1/32 or 1/64 of
Start bit, 8 data bits, stop bit,
rate generator or timer 1)
rate generator or timer 1)
2
smod
SM20
* f
CKMPU
UART 0
Using Timer 1
f
© 2005-2011 Teridian Semiconductor Corporation
CKMPU
N/A
Table 12: Baud Rate Generation
/ (384 * (256-TH1))
N/A
Table 14: The S0CON Register
REN0
Table 13: UART Modes
TB80
3-Phase Energy Meter IC
Start bit, 8 data bits, stop bit, variable baud rate
Start bit, 8 data bits, parity, stop bit, variable
RB80
baud rate (internal baud rate generator)
Using Internal Baud Rate Generator
(internal baud rate generator)
71M6513/71M6513H
2
smod
TI0
f
CKMPU
DATA SHEET
* f
UART 1
CKMPU
/(32 * (2
N/A
N/A
/(64 * (2
RI0
LSB
10
-S1REL))
10
-S0REL))
AUGUST 2011