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X9421 Datasheet(PDF) 9 Page - Renesas Technology Corp |
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X9421 Datasheet(HTML) 9 Page - Renesas Technology Corp |
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9 / 20 page  X9421 FN8196 Rev.1.00 Page 9 of 20 January 14, 2009 TABLE 3. INSTRUCTION SET Instruction Format NOTES: 1. “A0”: stands for the device addresses sent by the master. 2. WPx refers to wiper position data in the Wiper Counter Register“I”: stands for the increment operation, SI held HIGH during active SCK phase (high). 3. “D”: stands for the decrement operation, SI held LOW during active SCK phase (high). Read Wiper Counter Register (WCR) Write Wiper Counter Register (WCR) Read Data Register (DR) Read the contents of the Register pointed to by R1 - R0. Write Data Register (DR) Write a new value to the Register pointed to by R1 - R0. INSTRUCTION INSTRUCTION SET OPERATION I3 I2 I1 I0 R1 R0 Read Wiper Counter Register 1 0 0 1 0 0 0 0 Read the contents of the Wiper Counter Register Write Wiper Counter Register 1 0 1 0 0 0 0 0 Write new value to the Wiper Counter Register Read Data Register 1 0 1 1 1/0 1/0 0 0 Read the contents of the Data Register pointed to by R1 - R0 Write Data Register 1 1 0 0 1/0 1/0 0 0 Write new value to the Data Register pointed to by R1 - R0 XFR Data Register to Wiper Counter Register 1 1 0 1 1/0 1/0 0 0 Transfer the contents of the Data Register pointed to by R1 - R0 to the Wiper Counter Register XFR Wiper Counter Register to Data Register 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 R1 - R0 Increment/Decrement Wiper Counter Register 0 0 1 0 0 0 0 0 Enable Increment/decrement of the Wiper Counter Register Read Status (WIP bit) 0 1 0 1 0 0 0 1 Read the status of the internal write cycle, by checking the WIP bit. CS FALLING EDGE DEVICE TYPE IDENTIFIER DEVICE ADDRESSES INSTRUCTION OPCODE WIPER POSITION (SENT BY X9421 ON SO) CS RISING EDGE 010 111 0 A0 1 0 0 1 00 000 0 WP5 WP4 WP3 WP2 WP1 WP0 CS FALLING EDGE DEVICE TYPE IDENTIFIER DEVICE ADDRESSES INSTRUCTION OPCODE DATA BYTE (SENT BY HOST ON SI) CS RISING EDGE 010 111 0 A0 1 0 1 0 0 000 00 WP5 WP4 WP3 WP2 WP1 WP0 CS FALLING EDGE DEVICE TYPE IDENTIFIER DEVICE ADDRESSES INSTRUCTION OPCODE REGISTER ADDRESSES DATA BYTE (SENT BY X9421 ON SO) CS RISING EDGE 010111 0 A0 1 0 1 1 R1 R0 0000 WP5 WP4 WP3 WP2 WP1 WP0 CS FALLING EDGE DEVICE TYPE IDENTIFIER DEVICE ADDRESSES INSTRUCTION OPCODE REGISTER ADDRESSES DATA BYTE (SENT BY HOST ON SI) CS RISING EDGE HIGH-VOLTAGE WRITE CYCLE 0101 1 1 0 A 0 1100 R 1 R 0 00 0 0 WP 5 WP 4 WP 3 WP 2 WP 1 WP 0 |
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