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ABB SDCS-PIN-46-COAT 3BSE004939R1003 Logic conversion module

ABB SDCS-PIN-46-COAT 3BSE004939R1003 Logic conversion module

ABB SDCS-PIN-46-COAT 3BSE004939R1003 Logic conversion module

Two SQUELCH modes are available with the ADN2816. SQUELCH DATAOUT and CLKOUT mode is selected when CTRLC[1] = 0 (default mode). In this mode, when the SQUELCH input, Pin 27, is driven to a TTL high state, both the clock and data outputs are set to the zero state to suppress downstream processing. If the SQUELCH function is not required, Pin 27 should be tied to VEE. SQUELCH DATAOUT or CLKOUT mode is selected when CTRLC[1] is 1. In this mode, when the SQUELCH input is driven to a high state, the DATAOUTN/DATAOUTP pins are squelched. When the SQUELCH input is driven to a low state, the CLKOUT pins are squelched. This is especially useful in repeater applications, where the recovered clock may not be needed.

I 2 C INTERFACE 

The ADN2816 supports a 2-wire, I2 C compatible, serial bus driving multiple peripherals. Two inputs, serial data (SDA) and serial clock (SCK), carry information between any devices connected to the bus. Each slave device is recognized by a unique address. The ADN2816 has two possible 7-bit slave addresses for both read and write operations. The MSB of the 7-bit slave address is factory programmed to 1. B5 of the slave address is set by Pin 19, SADDR5. Slave Address Bits [4:0] are defaulted to all 0s. The slave address consists of the 7 MSBs of an 8-bit word. The LSB of the word either sets a read or write operation (see Figure 6). Logic 1 corresponds to a read operation, while Logic 0 corresponds to a write operation.

To control the device on the bus

the following protocol must be followed. First, the master initiates a data transfer by establishing a start condition, defined by a high-to-low transition on SDA while SCK remains high. This indicates that an address/ data stream follows. All peripherals respond to the start condition and shift the next eight bits (the 7-bit address and the R/W bit). The bits are transferred from MSB to LSB. The peripheral that recognizes the transmitted address responds by pulling the data line low during the ninth clock pulse. This is known as an acknowledge bit. All other devices withdraw from the bus at this point and maintain an idle condition. The idle condition is where the device monitors the SDA and SCK lines waiting for the start condition and correct transmitted address. The R/W bit determines the direction of the data. Logic 0 on the LSB of the first byte means that the master writes information to the peripheral. Logic 1 on the LSB of the first byte means that the master reads information from the peripheral.

                                           

Company introduction

Temporal Ming sheng automation equipment co., LTD. Was established in April 02, 2021, registered jiujiang ruichang city in jiangxi province, east yi road no. 23 lake farmers 401 mall, the legal representative person Zhou Zuochen.

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