参数资料
型号: ST7285C
厂商: 意法半导体
英文描述: 8-BIT MCU FOR RDS WITH 48K ROM, 3K RAM, ADC, TWO TIMERS, TWO SPIs, I2C AND SCI INTERFACES
中文描述: 8位微控制器48,000铁路发展策略光盘,3K内存,ADC,两个定时器,2个SPI,I2C和脊髓损伤接口
文件页数: 32/117页
文件大小: 748K
代理商: ST7285C
32/117
ST7285C
SERIAL COMMUNICATIONS INTERFACE
(Cont’d)
This TR factor is used only when the PSBRT fine
tuning factor is equal to 0; otherwise, TR is re-
placed by the PSBRT dividing factor.
Bit-2 =
SCR2
Receiver rate divisor MSB
Bit-1 =
SCR1
Receiver rate divisor NSB
Bit-0 =
SCR0
Receiver rate divisor LSB
These 3 bits, in conjunction with the 2 previous bits
define the total division applied to the bus clock to
yield the receive rate clock in conventional Baud
Rate Generator mode..
This RR factor is used only when the PSBRR fine
tuning factor is equal to 0; otherwise, RR is re-
placed by the PSBRR dividing factor.
4.2.7.6 External Receive Prescaler Division
Register (PSCBRR)
Address: 0055h
Read/Write
Reset Value: 00h
Allows setting of the External Prescaler rate divi-
sion factor for the receive circuit.
When the register is set to 00h, the conventional
Baud Rate Generator is used for the receive cir-
cuit, otherwise the master clock frequency is divid-
ed by the binary factor set in the PSCBRR register
(in the range 1 to 255).
4.2.7.7 External Transmit Prescaler Division
Register (PSCBRT)
Address: 0057h
Read/Write
Reset Value: 00h
Allows setting of the External Prescaler rate divi-
sion factor for the transmit circuit.
When the register is set to 00h, the conventional
Baud Rate Generator is used for the transmit cir-
cuit, otherwise the master clock frequency is divid-
ed by the binary factor set in the PSCBRTregister
(in the range 1 to 255).
SCT2
0
0
0
0
1
1
1
1
SCT1
0
0
1
1
0
0
1
1
SCT0
0
1
0
1
0
1
0
1
TR dividing factor
1
2
4
8
16
32
64
128
SCR2
0
0
0
0
1
1
1
1
SCR1
0
0
1
1
0
0
1
1
SCR0
0
1
0
1
0
1
0
1
RR dividing factor
1
2
4
8
16
32
64
128
7
6
5
4
3
2
1
0
PRBR
7
PRBR
6
PRBR
5
PRBR
4
PRBR
3
PRBR
2
PRBR
1
PRBR
0
7
6
5
4
3
2
1
0
PTBR
7
PTBR
6
PTBR
5
PTBR
4
PTBR
3
PTBR
2
PTBR
1
PTBR
0
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