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HT56RB688 データシート(PDF) 73 Page - Holtek Semiconductor Inc |
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HT56RB688 データシート(HTML) 73 Page - Holtek Semiconductor Inc |
73 / 164 page SIMn Control Register 1 - SIMnCTL1 (n=0 or 1) for I 2C Mode Bit 76543210 Name HCFn HAASn HBBn HTXn TXAKn SRWn ¾ RXAKn R/W R/W R/W R/W R/W R/W R/W ¾ R/W POR 100000 ¾ 0 Bit 7 HCFn:I 2C Bus data transfer completion flag 0: Data is being transferred 1: Completion of an 8-bit data transfer The HCFn flag is the data transfer flag. This flag will be zero when data is being transferred. Upon completion of an 8-bit data transfer the flag will go high and an interrupt will be generated. Bit 6 HAASn:I 2C Bus address match flag 0: No address match 1: Address match The HAASn flag is the address match flag. This flag is used to determine if the slave device address is the same as the master transmit address. If the addresses match, then this bit will be high. If there is no address match, then the flag will be low. Bit 5 HBBn:I 2C Bus busy flag 0: I 2C Bus is not busy 1: I 2C Bus is busy The HBBn flag is the I 2C busy flag. This flag will be 1 when the I2C bus is busy which will occur when a START signal is detected. The flag will be set to 0 when the bus is free which will occur when a STOP signal is detected. Bit 4 HTXn: Select I 2C slave device is transmitter or receiver 0: Slave device is the receiver 1: Slave device is the transmitter Bit 3 TXAKn:I 2C Bus transmit acknowledge flag 0: Slave sends acknowledge flag 1: Slave does not send acknowledge flag The TXAKn bit is the transmit acknowledge flag. After the slave device receipt of 8-bit of data, this bit will be transmitted to the bus on the 9th clock from the slave device. The slave device must always set TXAKn bit to 0 before further data is received. Bit 2 SRWn:I 2C Slave Read/Write flag 0: Slave device should be in receive mode 1: Slave device should be in transmit mode The SRWn flag is the I 2C Slave Read/Write flag. This flag determines whether the master device wishes to transmit or receive data to or from the I 2C bus. When the transmitted address and slave address is match, that is when the HAASn flag is set high, the slave device will check the SRWn flag to determine whether it should be in transmit mode or receive mode. If the SRWn flag is high, the master is requesting to read data from the bus, so the slave device should be in transmit mode. When the SRWn flag is zero, the master will write data to the bus, therefore the slave device should be in receive mode to read this data. Bit 1 unimplemented, read as ²0² Bit 0 RXAKn:I 2C Bus Receive acknowledge flag 0: Slave receives acknowledge flag 1: Slave does not receive acknowledge flag The RXAKn flag is the receiver acknowledge flag. When the RXAKn flag is 0, it means that a acknowledge signal has been received at the 9th clock, after 8 bits of data have been transmitted. When the slave device in the transmit mode, the slave device checks the RXAKn flag to determine if the master receiver wishes to receive the next byte. The slave transmitter will therefore continue sending out data until the RXAKn flag is 1. When this occurs, the slave transmitter will release the SDAn line to allow the master to send a STOP signal to release the I 2C Bus. HT56RB688 TinyPowerTM A/D type Smart Card OTP MCU with LCD, DAC, ISO 7816 and USB Interfaces Rev. 1.10 73 April 15, 2013 |
同様の部品番号 - HT56RB688_13 |
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同様の説明 - HT56RB688_13 |
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