71M6521DEIM-DB Maxim Integrated Products, 71M6521DEIM-DB Datasheet - Page 124
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71M6521DEIM-DB
Manufacturer Part Number
71M6521DEIM-DB
Description
Power Management Modules & Development Tools 71M6521DE DEMO BOARD M6521DE DEMO BOARD
Manufacturer
Maxim Integrated Products
Datasheet
1.71M6521DE-DB.pdf
(138 pages)
Specifications of 71M6521DEIM-DB
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Note: The speed in Mode 2 depends on the SMOD bit in the Special Function Register PCON when SMOD = 1,
Fclk/32.
The Serial Interface 1 can operate in 2 modes:
Mode A
This mode is similar to Mode 2 and 3 of serial interface 0. 11 bits are transmitted or received: a start bit (0), 8 data bits
(LSB first), a programmable 9
at transmission, bit tb81 in S1CON is output as the 9th bit, and at receive, the 9th bit affects rb81 in the Special
Function Register S1CON. The only difference between Mode 3 and A is that in Mode A, only the internal baud rate
generator can be use to specify baud rate.
Mode B
This mode is similar to Mode 1 of serial interface 0. Pin rxd1 serves as an input, and txd1 serves as a serial output. No
external shift clock is used. 10 bits are transmitted: a start bit (always 0), 8 data bits (LSB first), and a stop bit (always
1). On receive, a start bit synchronizes the transmission. 8 data bits are available by reading S1BUF, and the stop bit
sets the flag rb81 in the Special Function Register S1CON. In mode B, the internal baud rate generator specifies the
baud rate.
Serial Interface 1 Control Register (S1CON).
The function of the serial port depends on the setting of the Serial Port Control Register S1CON.
Revision 1.7
Serial Interface 1 Modes
MSB
SM
SM0
SM
0
0
1
1
0
1
th
-
bit, and a stop bit (1). The 9
© Copyright 2005-2007 TERIDIAN Semiconductor Corporation
SM1
Mode
0
1
0
1
A
B
SM21
Table 6-31: The S1CON Register
Table 6-29: Serial Port 0 Modes
Description
9-bit UART
8-bit UART
Table 6-30: Serial 1 Modes
Mode
0
1
2
3
REN1
TERIDIAN Proprietary
Description
shift register
8-bit UART
9-bit UART
9-bit UART
th
TB81
bit can be used to control the parity of the serial interface:
Baud Rate
variable
variable
RB81
Baud Rate
Fclk/12
Variable
Fclk/32 or /64
Variable
TI1
71M652X Software User’s Guide
RI1
LSB
124 of 138
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