I2
參數(shù)資料
型號： ADUC7124BCPZ126-RL
廠商： Analog Devices Inc
文件頁數(shù)： 83/108頁
文件大小： 0K
描述： IC DAS MCU ARM7 ADC/DDS 64-LQFP
產(chǎn)品培訓(xùn)模塊： Direct Digital Synthesis Tutorial Series (1 of 7): Introduction
標準包裝： 2,500
系列： MicroConverter® ADuC7xxx
核心處理器： ARM7
芯體尺寸： 16/32-位
速度： 41.78MHz
連通性： EBI/EMI，I²C，SPI，UART/USART
外圍設(shè)備： POR，PWM，WDT
輸入/輸出數(shù)： 30
程序存儲器容量： 126KB（63K x 16）
程序存儲器類型： 閃存
RAM 容量： 32K x 8
電壓 - 電源 (Vcc/Vdd)： 2.7 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 10x12b; D/A 2x12b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 125°C
封裝/外殼： 64-LFQFN 裸露焊盤，CSP
包裝： 帶卷 (TR)
ADuC7124/ADuC7126
Data Sheet
Rev. C | Page 76 of 108
Bit
Name
Description
[12:11]
I2CID[1:0]
I2C address matching register. These bits indicate which I2CxIDx register matches the received address.
[00] = received address matches I2CxID0.
[01] = received address matches I2CxID1.
[10] = received address matches I2CxID2.
[11] = received address matches I2CxID3.
10
I2CSS
I2C stop condition after start detected bit.
This bit is set to 1 when a stop condition is detected after a previous start and matching address.
When the I2CSSENI bit in I2CxSCON is set, an interrupt is generated.
This bit is cleared by reading this register.
[9:8]
I2CGCID[1:0]
I2C general call ID bits.
[00] = no general call received.
[01] = general call reset and program address.
[10] = general program address.
[11] = general call matching alternative ID.
Note that these bits are not cleared by a general call reset command.
Clear these bits by writing a 1 to the I2CGCCLR bit in I2CxSCON.
7
I2CGC
I2C general call status bit.
This bit is set to 1 if the slave receives a general call command of any type.
If the command received is a reset command, then all registers return to their default states.
If the command received is a hardware general call, the Rx FIFO holds the second byte of the command
and this can be compared with the I2CxALT register.
Clear this bit by writing a 1 to the I2CGCCLR bit in I2CxSCON.
6
I2CSBUSY
I2C slave busy status bit.
Set to 1 when the slave receives a start condition.
Cleared by hardware if the received address does not match any of the I2CxIDx registers, the slave device
receives a stop condition, or a repeated start address does not match any of the I2CxIDx registers.
5
I2CSNA
I2C slave NACK data bit.
This bit is set to 1 when the slave responds to a bus address with a NACK. This bit is asserted if a NACK was
returned because there was no data in the Tx FIFO or the I2CNACKEN bit was set in the I2CxSCON register.
This bit is cleared in all other conditions.
4
I2CSRxFO
Slave Rx FIFO overflow.
This bit is set to 1 when a byte is written to the Rx FIFO when it is already full.
This bit is cleared in all other conditions.
I2CSRXQ
I2C slave receive request bit.
This bit is set to 1 when the slave Rx FIFO is not empty.
This bit causes an interrupt to occur when the I2CSRXENI bit in I2CxSCON is set.
3
The Rx FIFO must be read or flushed to clear this bit.
2
I2CSTXQ
I2C slave transmit request bit.
This bit is set to 1 when the slave receives a matching address followed by a read.
If the I2CSETEN bit in I2CxSCON = 0, this bit goes high just after the negative edge of SCL during the read
bit transmission.
If the I2CSETEN bit in I2CxSCON = 1, this bit goes high just after the positive edge of SCL during the read
bit transmission.
This bit causes an interrupt to occur when the I2CSTXENI bit in I2CxSCON is set.
This bit is cleared in all other conditions.
1
I2CSTFE
I2C slave FIFO underflow status bit.
This bit goes high if the Tx FIFO is empty when a master requests data from the slave. This bit is asserted at
the rising edge of SCL during the read bit.
This bit is cleared in all other conditions.
0
I2CETSTA
I2C slave early transmit FIFO status bit.
If the I2CSETEN bit in I2CxSCON = 0, this bit goes high if the slave Tx FIFO is empty.
If the I2CSETEN bit in I2CxSCON = 1, this bit goes high just after the positive edge of SCL during the write
bit transmission.
This bit asserts once only for a transfer.
This bit is cleared after being read.
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