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WMS7201010P Datasheet(PDF) 6 Page - Winbond |
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WMS7201010P Datasheet(HTML) 6 Page - Winbond |
6 / 32 page WMS7204 - 6 - 6. PIN DESCRIPTION TABLE 1 – PIN DESCRIPTION PIN NAME PIN NO I/O DESCRIPTION CLK 2 I Serial Clock pin. Data Shifts in one bit at a time on positive clock (CLK) edges CS 1 I Chip Select pin. When CS is HIGH, WMS7204 is deselected and the SDO pin is at high impedance, and (unless an internal write cycle is underway) the device will be in the standby state. CS LOW enables WMS7204, placing it in the active power mode. It should be noted that after a power-up, a HIGH to LOW transition on CS is required prior to the start of any operation. SDI 3 I Serial Data Input pin. All opcodes, byte addresses and data to be written to the registers are input on this pin. Data is latched by the rising edge of the serial clock. SDO 18 O Serial Data Output pin with open-drain output. During a read cycle, data is shifted out on this pin. Data is clocked out by the falling edge of the serial clock except for the 1 st bit , which is clocked out by the falling edge of CS. Also can be used to daisy-chain several parts. R/B 6 O Ready signal with active-LOW, open-drain output, and acknowledges the completion of commands 2, 4, 5, 6, and 7. WP 4 I Hardware Write Protect pin. When active LOW WP prevents any changes to the present contents except retrieving NVMEM contents. VDD 20 - Power Supply VSS 5 - Ground pin, logic ground reference VA1 18 - A terminal of potentiometer ‘1’, equivalent to the HI terminal connection on a mechanical potentiometer VB1 16 - B terminal of potentiometer ‘1’, equivalent to the LO terminal connection on a mechanical potentiometer VW1 17 O Wiper terminal of potentiometer ‘1’, equivalent to the wiper terminal of a mechanical potentiometer VA2 13 - A terminal of potentiometer ‘2’, equivalent to the HI terminal connection on a mechanical potentiometer. VB2 15 - B terminal of potentiometer ‘2’, equivalent to the LO terminal connection on a mechanical potentiometer. VW2 14 O Wiper terminal of potentiometer ‘2’, equivalent to the wiper terminal of a mechanical potentiometer. VA3 12 - A terminal of potentiometer ‘3’, equivalent to the HI terminal |
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