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參數(shù)資料
| 型號(hào)： | ST92F120V6T |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, FLASH, 24 MHz, MICROCONTROLLER, PQFP64 |
| 封裝： | TQFP-64 |
| 文件頁(yè)數(shù)： | 147/313頁(yè) |
| 文件大?。?/td> | 4439K |
| 代理商： | ST92F120V6T |
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I2C BUS INTERFACE
I2C INTERFACE (Cont’d)
I2C STATUS REGISTER 2 (I2CSR2)
R242 - Read Only
Register Page: 20
Reset Value: 0000 0000 (00h)
Note: Some bits of this register are reset by a read
operation of the register. Care must be taken when
using instructions that work on single bit. Some of
them perform a read of all the bits of the register
before modifying or testing the wanted bit. So oth-
er bits of the register could be affected by the op-
eration.
In the same way, the test/compare operations per-
form a read operation.
Moreover, if some interrupt events occur while the
register is read, the corresponding flags are set,
and correctly read, but if the read operation resets
the flags, no interrupt request occurs.
Bit 7:6 = Reserved. Forced to 0 by hardware.
Bit 5 = ADDTX
Address or 2nd header transmitted
in Master mode.
This bit is set by hardware when the peripheral,
enabled in Master mode, has received the ac-
knowledge relative to:
– Address byte in 7-bit mode
– Address or 2nd header byte in 10-bit mode.
0: No address or 2nd header byte transmitted
1: Address or 2nd header byte transmitted.
Bit 4 = AF
Acknowledge Failure.
This bit is set by hardware when no acknowledge
is returned. An interrupt is generated if ITE=1.
It is cleared by software reading I2CSR2 register
after the falling edge of the acknowledge SCL
pulse, or by hardware when the interface is disa-
bled (I2CCR.PE=0).
The SCL line is not held low while AF=1.
0: No acknowledge failure detected
1: A data or address byte was not acknowledged
Bit 3 = STOPF
Stop Detection (Slave mode).
This bit is set by hardware when a Stop condition
is detected on the bus after an acknowledge. An
interrupt is generated if ITE=1.
It is cleared by software reading I2CSR2 register
or by hardware when the interface is disabled
(I2CCR.PE=0).
The SCL line is not held low while STOPF=1.
0: No Stop condition detected
1: Stop condition detected (while slave receiver)
Bit 2 = ARLO
Arbitration Lost.
This bit is set by hardware when the interface (in
master mode) loses the arbitration of the bus to
another master. An interrupt is generated if ITE=1.
It is cleared by software reading I2CSR2 register
or by hardware when the interface is disabled
(I2CCR.PE=0).
After an ARLO event the interface switches back
automatically to Slave mode (M/SL=0).
The SCL line is not held low while ARLO=1.
0: No arbitration lost detected
1: Arbitration lost detected
Bit 1 = BERR
Bus Error.
This bit is set by hardware when the interface de-
tects a Start or Stop condition during a byte trans-
fer. An interrupt is generated if ITE=1.
It is cleared by software reading I2CSR2 register
or by hardware when the interface is disabled
(I2CCR.PE=0).
The SCL line is not held low while BERR=1.
Note: If a misplaced start condition is detected,
also the ARLO flag is set; moreover, if a misplaced
stop condition is placed on the acknowledge SCL
pulse, also the AF flag is set.
0: No Start or Stop condition detected during byte
transfer
1: Start or Stop condition detected during byte
transfer
Bit 0 = GCAL
General Call address matched.
This bit is set by hardware after an address
matches with the value stored in the I2CADR reg-
ister while ENGC=1. In the I2CADR the General
Call address must be placed before enabling the
peripheral.
It is cleared by hardware after the detection of a
Stop condition, or when the peripheral is disabled
(I2CCR.PE=0).
0: No match
1: General Call address matched.
70
0
ADDTX
AF
STOPF ARLO
BERR
GCAL
9
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| ST92F120V9Q7 | 功能描述:8位微控制器 -MCU RO 511-ST92F150CV1QB RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| ST92F124R9TB | 功能描述:8位微控制器 -MCU Flash 64K SCI/SPI/I2 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| ST92F124V1QB | 功能描述:8位微控制器 -MCU Flash 128K 2SCI/SPI RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
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| ST92F124V1T6TR | 制造商:STMicroelectronics 功能描述: |
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