
Table of Contents
1.0 General Description ..................................................................................................................................... 1
2.0 Features ....................................................................................................................................................... 1
3.0 Block Diagram .............................................................................................................................................. 1
4.0 Pin Assignments ........................................................................................................................................... 2
5.0 Signal Descriptions ...................................................................................................................................... 4
6.0 Typical Application ........................................................................................................................................ 5
6.1 I/O EXPANSION OPTIONS ....................................................................................................................... 5
6.2 WATCHDOG TIMER ................................................................................................................................. 5
6.3 HALT MODE .............................................................................................................................................. 5
6.3.1 ACCESS.bus Activity ........................................................................................................................... 5
6.4 KEYPAD SCANNING ................................................................................................................................ 6
6.5 COMMUNICATION INTERFACE .............................................................................................................. 6
6.5.1 Interrupts Between the Host and LM8333 .......................................................................................... 6
6.5.2 Interrupt Sources ................................................................................................................................. 6
7.0 Device Operation ......................................................................................................................................... 6
7.1 EVENT CODE ASSIGNMENT .................................................................................................................. 6
7.2 I/O EXPANSION ........................................................................................................................................ 7
7.2.1 PWM Output with Programmable Duty Cycle ..................................................................................... 7
7.2.2 General-Purpose I/O (GPIO) ............................................................................................................... 8
7.2.3 External Interrupts ............................................................................................................................... 9
7.3 HOST COMMAND EXECUTION ............................................................................................................ 10
7.3.1 Command Structure ........................................................................................................................... 10
7.4 HOST WRITE COMMANDS ................................................................................................................... 10
7.5 HOST READ COMMANDS ..................................................................................................................... 10
7.6 WAKE-UP FROM HALT MODE .............................................................................................................. 11
8.0 Interrupts .................................................................................................................................................... 12
8.1 INTERRUPT CODE ................................................................................................................................. 12
8.2 ERROR CODE ........................................................................................................................................ 12
8.3 STATUS CODES ..................................................................................................................................... 12
8.4 INTERRUPT PROCESSING ................................................................................................................... 12
8.5 COMMAND EXECUTION SUMMARY .................................................................................................... 13
9.0 Electrical Characteristics ............................................................................................................................ 14
10.0 Absolute Maximum Ratings ..................................................................................................................... 14
11.0 DC Electrical Characteristics .................................................................................................................... 14
12.0 AC Electrical Characteristics .................................................................................................................... 15
13.0 Physical Dimensions ................................................................................................................................ 17
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