ATSHA204A
8.1. I/O Blocks................................................................................................................................... 42
8.2. Sleep Sequence......................................................................................................................... 43
8.3. Idle Sequence............................................................................................................................ 43
8.4. Watchdog Failsafe......................................................................................................................43
8.5. Command Sequence..................................................................................................................44
9. Compatibility............................................................................................................ 66
10. Mechanical.............................................................................................................. 67
10.1. Pinout......................................................................................................................................... 67
11. Package Marking Information..................................................................................68
12. Package Drawings...................................................................................................69
12.1. 8-pad UDFN............................................................................................................................... 69
12.2. 8-lead SOIC................................................................................................................................72
12.3. 8-lead TSSOP............................................................................................................................ 75
12.4. 3 Lead Contact........................................................................................................................... 77
12.5. 3-lead SOT23............................................................................................................................. 79
13. Reference and Application Notes............................................................................ 83
13.1. SHA-256.....................................................................................................................................83
13.2. HMAC/SHA-256......................................................................................................................... 83
13.3. Key Values................................................................................................................................. 84
14. Revision History.......................................................................................................88
The Microchip Web Site................................................................................................ 89
Customer Change Notification Service..........................................................................89
Customer Support......................................................................................................... 89
Product Identification System........................................................................................ 90
Microchip Devices Code Protection Feature................................................................. 91
Legal Notice...................................................................................................................91
Trademarks................................................................................................................... 91
Quality Management System Certified by DNV.............................................................92
Worldwide Sales and Service........................................................................................93
© 2018 Microchip Technology Inc.
DS40002025A-page 4