WMS7201050M WINBOND [Winbond], WMS7201050M Datasheet - Page 4

• Manufacturer Part Number: WMS7201050M
• Description: 256-TAP QUAD-CHANNEL NON-VOLATILE DIGITAL POTENTIOMETER
• Manufacturer: WINBOND [Winbond]

4. TABLE OF CONTENTS
1. GENERAL DESCRIPTION.................................................................................................................. 2
2. FEATURES ......................................................................................................................................... 2
3. BLOCK DIAGRAM .............................................................................................................................. 3
4. TABLE OF CONTENTS ...................................................................................................................... 4
5. PIN CONFIGURATION ....................................................................................................................... 5
6. PIN DESCRIPTION ............................................................................................................................. 6
7. FUNCTIONAL DESCRIPTION............................................................................................................ 8
8. TIMING DIAGRAMS.......................................................................................................................... 18
9. ABSOLUTE MAXIMUM RATINGS.................................................................................................... 20
10. ELECTRICAL CHARACTERISTICS ............................................................................................... 21
11. TYPICAL APPLICATION CIRCUIT ................................................................................................. 24
12. PACKAGE DRAWINGS AND DIMENSIONS.................................................................................. 28
13. ORDERING INFORMATION........................................................................................................... 31
14. VERSION HISTORY ....................................................................................................................... 32
7.1. Potentiometer and Rheostat Modes ............................................................................................. 8
7.2. Programming Modes .................................................................................................................... 8
7.3. Non-Volatile Memory (NVMEM) ................................................................................................... 9
7.4 Flow Control................................................................................................................................... 9
7.5. Daisy Chain ................................................................................................................................ 10
7.6. Serial Data Interface ................................................................................................................... 11
7.7. Instruction Set............................................................................................................................. 12
7.8. Basic Operation .......................................................................................................................... 13
10.1 Test Circuits............................................................................................................................... 23
11.1. Layout Considerations .............................................................................................................. 27
7.1.1. Rheostat Configuration .......................................................................................................... 8
7.1.2. Potentiometer Configuration .................................................................................................. 8
7.3.1 Write Protect of NVMEM ......................................................................................................... 9
7.8.1 Sending a Command ............................................................................................................ 14
7.8.2 Wake Up/Sleep/Power Commands ...................................................................................... 14
7.8.3 Write to Tap Register (TR).................................................................................................... 14
7.8.4 Programming Non-Volatile Memory (NVMEM)..................................................................... 16
7.8.5 Reading Tap Registers and NVMEM Locations ................................................................... 17
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WMS7204