73S1210F-68IMSLASHFSLASHP datasheet(43/126 Pages) TERIDIAN

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DS_1210F_001

73S1210F Data Sheet

Rev. 1.4

•

Mode 3

The only difference between Mode 2 and Mode 3 is that in Mode 3 either internal baud rate generator

or timer 1 can be use to specify baud rate.

The S0BUF register is used to read/write data to/from the serial 0 interface.

Serial Interface 0 Control Register (S0CON): 0x9B

 0x00

Transmit and receive data are transferred via this register.

Table 38: The S0CON Register

MSB

LSB

SM0

SM1

SM20

REN0

TB80

RB80

TI0

RI0

Bit

Symbol

Function

S0CON.7

SM0

These two bits set the UART0 mode:

Mode

Description

SM0

SM1

N/A

8-bit UART

9-bit UART

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 9th 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 9th 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.

73S1210F-68IM/F/P Datasheet(PDF) 43 Page - Teridian Semiconductor Corporation

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