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X9119TV14-2.7 Datasheet(PDF) 6 Page - Intersil Corporation |
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X9119TV14-2.7 Datasheet(HTML) 6 Page - Intersil Corporation |
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6 / 17 page  6 FN8162.4 July 9, 2008 Instruction and Register Description Device Addressing: Identification Byte (ID and A) Following a start condition, the master must output the address of the slave it is accessing. The most significant four bits of the slave address are the device type identifier. The ID[3:0] bits is the device id for the X9119; this is fixed as 0101[B] (refer to Table 1). The A2–A0 bits in the ID byte is the internal slave address. The physical device address is defined by the state of the A2–A0 input pins. The slave address is externally specified by the user. The X9119 compares the serial data stream with the address input state; a successful compare of both address bits is required for the X9119 to successfully continue the command sequence. Only the device which slave address matches the incoming device address sent by the master executes the instruction. The A2–A0 inputs can be actively driven by CMOS input signals or tied to VCC or VSS. The R/W bit is the LSB and is be used to program the device for read or write operations. INSTRUCTION BYTE AND REGISTER SELECTION The next byte sent to the X9119 contains the instruction and register pointer information. The three most significant bits are used provide the instruction opcode (IOP[2:0]). The RB and RA bits point to one of the four registers. The format is shown below in Table 2. Table 3 provides a complete summary of the instruction set opcodes. TABLE 1. IDENTIFICATION BYTE FORMAT TABLE 2. INSTRUCTION BYTE FORMAT TABLE 3. INSTRUCTION SET NOTE: 1/0 = data is one or zero. ID3 ID2 ID1 ID0 A2 A1 A0 R/W 01 01 (MSB) (LSB) DEVICE TYPE IDENTIFIES INTERNAL SLAVE ADDRESS READ OR WRITE BIT I2 I1 I0 0 RB RA 0 0 (MSB) (LSB) INSTRUCTION OPCODE REGISTER SELECTION REGISTER SELECTED RB RA DR0 0 0 DR1 0 1 DR2 1 0 DR3 1 1 INSTRUCTION INSTRUCTION SET OPERATION R/W I2 I1 I0 0RB RA 0 0 Read Wiper Counter Register 1 1 0 0 0 0 0 0 0 Read the contents of the Wiper Counter Register Write Wiper Counter Register 0 1 0 1 0 0 0 0 0 Write new value to the Wiper Counter Register Read Data Register 1 1 0 1 0 1/0 1/0 0 0 Read the contents of the Data Register pointed to RB-RA. Write Data Register 0 1 1 0 0 1/0 1/0 0 0 Write new value to the Data Register pointed to RB-RA. XFR Data Register to Wiper Counter Register 1 1 1 0 0 1/0 1/0 0 0 Transfer the contents of the Data Register pointed to by RB-RA.to the Wiper Counter Register XFR Wiper Counter Register to Data Register 0 1 1 1 0 1/0 1/0 0 0 Transfer the contents of the Wiper Counter Register to the Data Register pointed to by RB-RA. X9119 |
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