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參數(shù)資料
| 型號： | ST72371 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 8-Bit MCUs with 16K ROM/OTP/EPROM, 512 Bytes RAM, ADC, DAC (PWM), Timer, IIC and SCI(8位微控制器(8M)) |
| 中文描述： | 8 - 16K的光碟/雙層/存儲器，512字節(jié)RAM，ADC和DAC的器（PWM），定時(shí)器，IIC和脊髓損傷（8位微控制器（8米）位MCU） |
| 文件頁數(shù)： | 59/94頁 |
| 文件大?。?/td> | 642K |
| 代理商： | ST72371 |
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59/94
ST72371/ST72372
SERIAL COMMUNICATIONS INTERFACE
(Cont’d)
4.5.4 Functional Description
The block diagram of the Serial Control Interface,
is shown in Figure 1. It contains 4 dedicated regis-
ters:
– Two control registers (CR1 & CR2)
– A status register (SR)
– A baud rate register (BRR)
Refer to the register descriptions inSection 0.1.5
for the definitions of each bit.
4.5.4.1 Serial Data Format
Word length may be selected as being either 8 or 9
bits by programming the M bit in the CR1 register
(see Figure 1).
The TDO pin is in low state during the start bit.
The TDO pin is in high state during the stop bit.
An Idle character is interpreted as an entire frame
of “1”s followed by the start bit of the next frame
which contains data.
A Break character is interpreted on receiving “0”s
for some multiple of the frame period. At the end of
the last break frame the transmitter inserts an ex-
tra “1” bit to acknowledge the start bit.
Transmission and reception are driven by their
own baud rate generator.
Figure 6. Word length programming
Bit0
Bit1
Bit2
Bit3
Bit4
Bit5
Bit6
Bit7
Bit8
Start
Bit
Stop
Bit
Next
Start
Bit
Idle Frame
Bit0
Bit1
Bit2
Bit3
Bit4
Bit5
Bit6
Bit7
Start
Bit
Stop
Bit
Next
Start
Bit
Start
Bit
Idle Frame
Start
Bit
9-bit Word length (M bit is set)
8-bit Word length (M bit is reset)
Possible
Parity
Bit
Possible
Parity
Bit
Break Frame
Start
Bit
Extra
’1’
Data Frame
Break Frame
Start
Bit
Extra
’1’
Data Frame
Next Data Frame
Next Data Frame
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| ST72372J4B1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCUs WITH 16K ROM/OTP/EPROM,512 BYTES RAM, ADC, DAC (PWM), TIMER, I2C AND SCI |
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