18 i2c controller, 1 i2c port pins, 2 i2c interface boot load access – Cypress Perform CY7C68013 User Manual
Page 13: 3 i2c interface general-purpose access, 19 compatible with previous generation ez-usb fx2
CY7C68013A, CY7C68014A
CY7C68015A, CY7C68016A
Document #: 38-08032 Rev. *L
Page 13 of 62
3.18 I
2
C Controller
FX2LP has one I
2
C port that is driven by two internal controllers,
one that automatically operates at boot time to load VID/PID/DID
and configuration information, and another that the 8051 uses
when running to control external I
2
C devices. The I
2
C port
operates in master mode only.
3.18.1 I
2
C Port Pins
The I
2
C pins SCL and SDA must have external 2.2 k
Ω pull up
resistors even if no EEPROM is connected to the FX2LP.
External EEPROM device address pins must be configured
properly. See
for configuring the device address pins.
3.18.2 I
2
C Interface Boot Load Access
At power on reset the I
2
C interface boot loader loads the
VID/PID/DID configuration bytes and up to 16 KBytes of
program/data. The available RAM spaces are 16 KBytes from
0x0000–0x3FFF and 512 bytes from 0xE000–0xE1FF. The 8051
is in reset. I
2
C interface boot loads only occur after power on
reset.
3.18.3 I
2
C Interface General-Purpose Access
The 8051 can control peripherals connected to the I
2
C bus using
the I
2
CTL and I2DAT registers. FX2LP provides I
2
C master
control only, it is never an I
2
C slave.
3.19 Compatible with Previous Generation
EZ-USB FX2
The EZ-USB FX2LP is form, fit and with minor exceptions
functionally compatible with its predecessor, the EZ-USB FX2.
This makes for an easy transition for designers wanting to
upgrade their systems from the FX2 to the FX2LP. The pinout
and package selection are identical and a vast majority of
firmware previously developed for the FX2 functions in the
FX2LP.
For designers migrating from the FX2 to the FX2LP a change in
the bill of material and review of the memory allocation (due to
increased internal memory) is required. For more information
about migrating from EZ-USB FX2 to EZ-USB FX2LP, see the
application note titled Migrating from EZ-USB FX2 to EZ-USB
FX2LP available in the
.
Table 8. Strap Boot EEPROM Address Lines to These Values
Bytes
Example EEPROM
A2
A1
A0
16
24LC00
N/A
N/A
N/A
128
24LC01
0
0
0
256
24LC02
0
0
0
4K
24LC32
0
0
1
8K
24LC64
0
0
1
16K
24LC128
0
0
1
Table 9. Part Number Conversion Table
EZ-USB FX2
Part Number
EZ-USB FX2LP
Part Number
Package Description
CY7C68013-56PVC
CY7C68013A-56PVXC or CY7C68014A-56PVXC
56-pin SSOP
CY7C68013-56PVCT
CY7C68013A-56PVXCT or CY7C68014A-56PVXCT 56-pin SSOP – Tape and Reel
CY7C68013-56LFC
CY7C68013A-56LFXC or CY7C68014A-56LFXC
56-pin QFN
CY7C68013-100AC
CY7C68013A-100AXC or CY7C68014A-100AXC
100-pin TQFP
CY7C68013-128AC
CY7C68013A-128AXC or CY7C68014A-128AXC
128-pin TQFP
Note
9. This EEPROM does not have address pins.