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1.1 FEATURES .............................................................................................................................................. 7
1.2 SYSTEM BLOCK DIAGRAM ................................................................................................................ 8
I/O PORT ................................................................................................................................................ 63
7.1 I/O PORT MODE ................................................................................................................................... 63
7.2 I/O PULL UP REGISTER ...................................................................................................................... 64
7.3 I/O PORT DATA REGISTER ................................................................................................................ 65
7.4 I/O PORT1 WAKEUP CONTROL REGISTER..................................................................................... 66
9.2 USB MACHINE ..................................................................................................................................... 82
9.3 USB INTERRUPT.................................................................................................................................. 82
9.4 USB ENUMERATION .......................................................................................................................... 83
9.5 USB REGISTERS .................................................................................................................................. 84
9.5.1 USB DEVICE ADDRESS REGISTER ............................................................................................. 84
9.5.2 USB STATUS REGISTER................................................................................................................ 84
9.5.3 USB DATA COUNT REGISTER ..................................................................................................... 85
9.5.4 USB ENABLE CONTROL REGISTER ............................................................................................ 85
9.5.5 USB endpoint’s ACK handshaking flag REGISTER ....................................................................... 85
9.5.6 USB endpoint’s NAK handshaking flag REGISTER ....................................................................... 86
9.5.7 USB ENDPOINT 0 ENABLE REGISTER ....................................................................................... 86
9.5.8 USB ENDPOINT 1 ENABLE REGISTER ....................................................................................... 87
9.5.9 USB ENDPOINT 2 ENABLE REGISTER ....................................................................................... 87
9.5.10 USB DATA POINTER REGISTER ................................................................................................ 88
9.5.11 USB DATA READ/WRITE REGISTER ......................................................................................... 88
9.5.12 USB ENDPOINT OUT TOKEN DATA BYTES COUNTER.......................................................... 88
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