EZ-USB Datasheet, PDF (75/334 Pages) Cypress Semiconductor – The EZ-USB USB Integrated Circuit

The results of this power-on test are reported in the ID1 and ID0 bits, as shown in
Table 4-3.
Table 4-3. Results of Power-On I²C Test
ID1 ID0
Meaning
0
0 No EEPROM detected
0
1 One-byte-address load EEPROM detected
1
0 Two-byte-address load EEPROM detected
1
1 Not used
Other EEPROM devices (with device address of 1010) can be attached to the I²C bus for
general purpose 8051 use, as long as they are strapped for address other than 000 or 001.
If a 24LC00 EEPROM is used, no other EEPROMS with device address 1010 may be
used, because the 24LC00 responds to all eight sub-addresses.
Page 4-14
Chapter 4. EZ-USB CPU
EZ-USB TRM v1.9