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參數(shù)資料
| 型號： | ST72121 |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash |
| 中文描述： | 8位微控制器與2/4/8K字節(jié)在系統(tǒng)可編程閃存 |
| 文件頁數(shù)： | 60/93頁 |
| 文件大小： | 915K |
| 代理商： | ST72121 |
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ST72E121 ST72T121
SERIAL COMMUNICATIONS INTERFACE
(Cont’d)
CONTROL REGISTER 1 (CR1)
Read/Write
Reset Value: Undefined
Bit 7 =
R8
Receive data bit 8.
This bit is used to store the 9th bit of the received
word when M=1.
Bit 6 =
T8
Transmit data bit 8.
This bit is used to store the 9th bit of the transmit-
ted word when M=1.
Bit 4 =
M
Word length.
This bit determines the word length. It is set or
cleared by software.
0: 1 Start bit, 8 Data bits, 1 Stop bit
1: 1 Start bit, 9 Data bits, 1 Stop bit
Bit 3 =
WAKE
Wake-Up method.
This bit determines the SCI Wake-Up method, it is
set or cleared by software.
0: Idle Line
1: Address Mark
CONTROL REGISTER 2 (CR2)
Read/Write
Reset Value: 0000 0000 (00h)
Bit 7 =
TIE
Transmitter interrupt enable
.
This bit is set and cleared by software.
0: interrupt is inhibited
1: An SCI interrupt is generated whenever
TDRE=1 in the SR register.
Bit 6 =
TCIE
Transmission complete interrupt ena-
ble
This bit is set and cleared by software.
0: interrupt is inhibited
1: An SCI interrupt is generated whenever TC=1 in
the SR register
Bit 5 =
RIE
Receiver interrupt enable
.
This bit is set and cleared by software.
0: interrupt is inhibited
1: An SCI interrupt is generated whenever OR=1
or RDRF=1 in the SR register
Bit 4 =
ILIE
Idle line interrupt enable.
This bit is set and cleared by software.
0: interrupt is inhibited
1: An SCI interrupt is generated whenever IDLE=1
in the SR register.
Bit 3 =
TE
Transmitter enable.
This bit enables the transmitter and assigns the
TDO pin to the alternate function. It is set and
cleared by software.
0: Transmitter is disabled, the TDO pin is back to
the I/O port configuration.
1: Transmitter is enabled
Note:
during transmission, a “0” pulse on the TE
bit (“0” followed by “1”) sends a preamble after the
current word.
Bit 2 =
RE
Receiver enable.
This bit enables the receiver. It is set and cleared
by software.
0: Receiver is disabled.
1: Receiver is enabled and begins searching for a
start bit.
Bit 1 =
RWU
Receiver wake-up.
This bit determines if the SCI is in mute mode or
not. It is set and cleared by software and can be
cleared by hardware when a wake-up sequence is
recognized.
0: Receiver in active mode
1: Receiver in mute mode
Bit 0 =
SBK
Send break.
This bit set is used to send break characters. It is
set and cleared by software.
0: No break character is transmitted
1: Break characters are transmitted
Note:
If the SBK bit is set to “1” and then to “0”, the
transmitter will send a BREAK word at the end of
the current word.
7
0
R8
T8
-
M
WAKE
-
-
-
7
0
TIE
TCIE
RIE
ILIE
TE
RE
RWU
SBK
60
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PDF描述 |
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| ST72121J2 | 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash |
| ST72121J4 | 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST72121J2 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT MICROCONTROLLER (MCU) WITH 8 TO 16 K ROM/OTP/EPROM. 384 TO 512 BYTES RAM. WDG. SCI. SPI & 2 TIMERS - SDIP42. TQFP44 |
| ST72121J4 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT MICROCONTROLLER (MCU) WITH 8 TO 16 K ROM/OTP/EPROM. 384 TO 512 BYTES RAM. WDG. SCI. SPI & 2 TIMERS - SDIP42. TQFP44 |
| ST72124J | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES |
| ST72124J2 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES |
| ST72124J2B | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES |
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