ii
Table of Contents
EZ-USB TRM v1.9
1.16
Reset and Power Management .............................................................. 1-15
1.17
EZ-USB Product Family ....................................................................... 1-16
1.18
Summary of AN2122, AN2126 Features ............................................. 1-16
1.19
Revision ID ........................................................................................... 1-17
1.20
Pin Descriptions .................................................................................... 1-18
2
EZ-USB CPU .................................................................................. 2-1
2.1
Introduction ............................................................................................. 2-1
2.2
8051 Enhancements ................................................................................ 2-1
2.3
EZ-USB Enhancements .......................................................................... 2-2
2.4
EZ-USB Register Interface ..................................................................... 2-2
2.5
EZ-USB Internal RAM ........................................................................... 2-3
2.6
I/O Ports .................................................................................................. 2-3
2.7
Interrupts ................................................................................................. 2-4
2.8
Power Control ......................................................................................... 2-5
2.9
SFRs ........................................................................................................ 2-6
2.10
Internal Bus ............................................................................................. 2-7
2.11
Reset ........................................................................................................ 2-7
3
EZ-USB Memory ............................................................................ 3-1
3.1
Introduction ............................................................................................. 3-1
3.2
8051 Memory .......................................................................................... 3-2
3.3
Expanding EZ-USB Memory ................................................................. 3-4
3.4
CS# and OE# Signals .............................................................................. 3-5
3.5
EZ-USB ROM Versions ......................................................................... 3-7
4
EZ-USB Input/Output ................................................................... 4-1
4.1
Introduction ............................................................................................. 4-1
4.2
IO Ports ................................................................................................... 4-2
4.3
IO Port Registers ..................................................................................... 4-5
4.4
I2C Controller ......................................................................................... 4-6
4.5
8051 I2C Controller ................................................................................ 4-6
4.5.1
START ...................................................................................... 4-8
4.5.2
STOP ........................................................................................ 4-8
4.6
Control Bits ............................................................................................. 4-8
4.6.1
LASTRD ................................................................................... 4-9
4.6.2
DONE ....................................................................................... 4-9
4.6.3
ACK .......................................................................................... 4-9
4.7
Status Bits ............................................................................................... 4-9
4.7.1
BERR ...................................................................................... 4-10
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