CY7C68013A, CY7C68014A
CY7C68015A, CY7C68016A
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 kΩ 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.
Table 8. Strap Boot EEPROM Address Lines to These Values
Bytes
16
128
256
4K
8K
16K
Example EEPROM
24LC00
24LC01
24LC02
24LC32
24LC64
24LC128
A2
N/A
0
0
0
0
0
A1
N/A
0
0
0
0
0
A0
N/A
0
0
1
1
1
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 9. Part Number Conversion Table
EZ-USB FX2
Part Number
CY7C68013-56PVC
CY7C68013-56PVCT
CY7C68013-56LFC
CY7C68013-100AC
CY7C68013-128AC
EZ-USB FX2LP
Part Number
CY7C68013A-56PVXC or CY7C68014A-56PVXC
CY7C68013A-56LFXC or CY7C68014A-56LFXC
CY7C68013A-100AXC or CY7C68014A-100AXC
CY7C68013A-128AXC or CY7C68014A-128AXC
Package Description
56-pin SSOP
56-pin QFN
100-pin TQFP
128-pin TQFP
CY7C68013A-56PVXCT or CY7C68014A-56PVXCT 56-pin SSOP – Tape and Reel
Note
9. This EEPROM does not have address pins.
Document #: 38-08032 Rev. *L
Page 13 of 62
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