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
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
Introduction ............................................................................................. 2-1
8051 Enhancements ................................................................................ 2-1
EZ-USB Enhancements .......................................................................... 2-2
EZ-USB Register Interface ..................................................................... 2-2
EZ-USB Internal RAM ........................................................................... 2-3
I/O Ports .................................................................................................. 2-3
Interrupts ................................................................................................. 2-4
Power Control ......................................................................................... 2-5
SFRs ........................................................................................................ 2-6
2.10 Internal Bus ............................................................................................. 2-7
2.11 Reset ........................................................................................................ 2-7
3
4
EZ-USB Memory ............................................................................ 3-1
3.1
3.2
3.3
3.4
3.5
Introduction ............................................................................................. 3-1
8051 Memory .......................................................................................... 3-2
Expanding EZ-USB Memory ................................................................. 3-4
CS# and OE# Signals .............................................................................. 3-5
EZ-USB ROM Versions ......................................................................... 3-7
EZ-USB Input/Output ................................................................... 4-1
4.1
4.2
4.3
4.4
4.5
Introduction ............................................................................................. 4-1
IO Ports ................................................................................................... 4-2
IO Port Registers ..................................................................................... 4-5
I2C Controller ......................................................................................... 4-6
8051 I2C Controller ................................................................................ 4-6
4.5.1
4.5.2
START ...................................................................................... 4-8
STOP ........................................................................................ 4-8
4.6
4.7
Control Bits ............................................................................................. 4-8
4.6.1
4.6.2
4.6.3
LASTRD ................................................................................... 4-9
DONE ....................................................................................... 4-9
ACK .......................................................................................... 4-9
Status Bits ............................................................................................... 4-9
4.7.1 BERR ...................................................................................... 4-10
ii
Table of Contents
EZ-USB TRM v1.9
CYPRESS [ CYPRESS ]
