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參數(shù)資料
| 型號： | TUSB3410VF |
| 英文描述： | BUS CONTROLLER |
| 中文描述： | 總線控制器 |
| 文件頁數(shù)： | 65/92頁 |
| 文件大?。?/td> | 317K |
| 代理商： | TUSB3410VF |
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10
–
1
10 I
2
C-Port
10.1 I
2
C Registers
10.1.1 I2CSTA: I
2
C Status and Control Register (Addr:FFF0)
This register is used to control the stop condition for read and write operations. In addition, it provides transmitter and
receiver handshake signals with their respective interrupt enable bits.
7
6
5
4
3
2
1
0
RXF
RIE
ERR
1/4
TXE
TIE
SRD
SWR
R/O
R/W
R/C
R/W
R/O
R/W
R/W
R/W
BIT
0
NAME
SWR
RESET
0
FUNCTION
Stop write condition. This bit determines if the I2C controller generates a stop condition when data
from the I2CDAO register is transmitted to an external device.
SWR = 0
Stop condition is not generated when data from the I2CDAO register is shifted out to an
external device.
SWR = 1
Stop condition is generated when data from the I2CDAO register is shifted out to an
external device.
Stop read condition. This bit determines if the I2C controller generates a stop condition when data is
received and loaded into the I2CDAI register.
1
SRD
0
SRD = 0
Stop condition is not
generated when data from the SDA line is shifted into the I2CDAI
register.
SRD = 1
Stop condition is generated when data from the SDA line are shifted into the I2CDAI
register.
I2C transmitter empty interrupt enable
2
TIE
0
TIE = 0
TIE = 1
I2C transmitter empty. This bit indicates that data can be written to the transmitter. It can be used for
polling or it can generate an interrupt.
Interrupt disable
Interrupt enable
3
TXE
1
TXE = 0
Transmitter is full. This bit is cleared when the MCU writes a byte to the II2CDAO
register.
Transmitter is empty. The I2C controller sets this bit when the contents of the I2CDAO
register are copied to the SDA shift register.
TXE = 1
4
1/4
0
Bus speed selection
1/4 = 0
1/4 = 1
100-kHz bus speed
400-kHz bus speed
5
ERR
0
Bus error condition. This bit is set by the hardware when the device does not respond. It is cleared by
the MCU.
ERR = 0
No bus error
ERR = 1
Bus error condition has been detected. Clears when the MCU writes a 1. Writing a 0 has
no effect.
I2C receiver ready interrupt enable
6
RIE
0
RIE = 0
RIE = 1
I2C receiver full. This bit indicates that the receiver contains new data. It can be used for polling or it
can generate an interrupt.
Interrupt disable
Interrupt enable
7
RXF
0
RXF = 0
Receiver is empty. This bit is cleared when the MCU reads the I2CDAI register.
Receiver contains new data. This bit is set by the I2C controller when the received serial
data has been loaded into the I2CDAI register.
RXF = 1
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