參數(shù)資料
型號： 73S1209F-EB
廠商： Maxim Integrated Products
文件頁數(shù)： 61/123頁
文件大?。?/td> 0K
描述： BOARD EVAL 73S1209F DOC/CD CABLE
產品培訓模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝： 1
主要目的： *
嵌入式： *
已用 IC / 零件： *
主要屬性： *
次要屬性： *
已供物品： 板，線纜，CD，電源
73S1209F Data Sheet
DS_1209F_004
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
0
N/A
0
1
8-bit UART
0
1
2
9-bit UART
1
0
3
9-bit UART
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 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.
1.7.4.2
Serial Interface 1
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 9th bit, and a stop bit (1). The 9th bit can be used to
control the parity of the serial interface: at transmission, bit TB81 in S1CON is outputted as the 9th
bit, and at receive, the 9th bit affects RB81 in 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 RX serves as input, and TX serves as 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 stop bit sets the flag RB81 in the Special Function Register
S1CON. In mode 1, the internal baud rate generator is use to specify the baud rate.
The S1BUF register is used to read/write data to/from the serial 1 interface.
42
Rev. 1.2
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