I2C Master Status Register Name: I2C0MSTA , I2C1" />
參數(shù)資料
型號： ADUC7122BBCZ-RL
廠商： Analog Devices Inc
文件頁數(shù)： 58/96頁
文件大?。?/td> 0K
描述： PRECISION ANALOG MCU I.C
標(biāo)準(zhǔn)包裝： 1
系列： MicroConverter® ADuC7xxx
核心處理器： ARM7
芯體尺寸： 16/32-位
速度： 41.78MHz
連通性： I²C，SPI，UART/USART
外圍設(shè)備： POR，PWM，WDT
輸入/輸出數(shù)： 32
程序存儲器容量： 126KB（63K x 16）
程序存儲器類型： 閃存
RAM 容量： 8K x 8
電壓 - 電源 (Vcc/Vdd)： 3 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 13x12b，D/A 12x12b
振蕩器型： 內(nèi)部
工作溫度： -10°C ~ 95°C
封裝/外殼： 108-LFBGA，CSPBGA
包裝： 標(biāo)準(zhǔn)包裝
其它名稱： ADUC7122BBCZ-RLDKR
ADuC7122
Rev. 0 | Page 61 of 96
I2C Master Status Register
Name:
I2C0MSTA , I2C1MSTA
Address:
0xFFFF0884, 0xFFFF0904
Default Value:
0x0000, 0x0000
Access:
Read
Function:
This 16-bit MMR is I2C status register in master mode.
Table 102 I2CxMSTA MMR Bit Designations
Bit
Name
Description
15:11
Reserved. These bits are reserved.
10
I2CBBUSY
I2C bus busy status bit.
This bit is set to 1 when a start condition is detected on the I2C bus.
This bit is cleared when a stop condition is detected on the bus.
9
I2CMRxFO
Master Rx FIFO overflow.
This bit is set to 1 when a byte is written to the Rx FIFO and it is already full.
This bit is cleared in all other conditions.
8
I2CMTC
I2C transmission complete status bit.
This bit is set to 1 when a transmission is complete between the master and the slave it was communicating with.
If the I2CMCENI bit in I2CxMCTL is set, an interrupt is generated when this bit is set.
Clear this bit to disable the interrupt source.
7
I2CMNA
I2C master NACK data bit.
This bit is set to 1 when a NACK condition is received by the master in response to a data write transfer.
If the I2CNACKENI bit in I2CxMCTL is set, an interrupt is generated when this bit is set.
This bit is cleared in all other conditions.
6
I2CMBUSY
I2C master busy status bit
Set to 1 when the master is busy processing a transaction.
Cleared if the master is ready or if another Master device has control of the bus.
5
I2CAL
I2C arbitration lost status bit.
This bit is set to 1 when the I2C master has lost in trying to gain control of the I2C bus.
If the I2CALENI bit in I2CxMCTL is set, an interrupt is generated when this bit is set.
This bit is cleared in all other conditions.
4
I2CMNA
I2C master NACK address bit.
This bit is set to 1 when a NACK condition is received by the master from an I2C slave address.
If the I2CNACKENI bit in I2CxMCTL is set, an interrupt is generated when this bit is set.
This bit is cleared in all other conditions.
3
I2CMRXQ
I2C master receive request bit.
This bit is set to 1 when data enters the Rx FIFO. If the I2CMRENI in I2CxMCTL is set, an interrupt is generated.
This bit is cleared in all other conditions.
2
I2CMTXQ
I2C master transmit request bit.
This bit goes high if the Tx FIFO is empty or only contains one byte and the master has transmitted an address and a
write. If the I2CMTENI bit in I2CxMCTL is set, an interrupt is generated when this bit is set.
This bit is cleared in all other conditions.
1:0
I2CMTFSTA
I2C master Tx FIFO status bits.
00 = I2C master Tx FIFO empty.
01 = one byte in master Tx FIFO.
10 = one byte in master Tx FIFO.
11 = I2C master Tx FIFO full.
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