Cypress specifications CY7C68300C/CY7C68301C CY7C68320C/CY7C68321C, Loadconfigdata

CY7C68300C/CY7C68301C

CY7C68320C/CY7C68321C

Table 11.Configuration Data Organization (continued)

Byte	Configuration	Configuration	Required	Variable
Address	Item Name	Item Description	Contents	Contents
0Xxx	Device name byte 4	ASCII Character		’r’ 0x72
0Xxx	Device name byte 5	ASCII Character		’e’ 0x65
0Xxx	Device name byte 6	ASCII Character		’s’ 0x73
0Xxx	Device name byte 7	ASCII Character		’s’ 0x73
0Xxx	Device name byte 8	ASCII Character		’ ’ 0x20
0Xxx	Device name byte 9	ASCII Character		’C’ 0x43
0Xxx	Device name byte 10	ASCII Character		’u’ 0x75
0Xxx	Device name byte 11	ASCII Character		’s’ 0x73
0Xxx	Device name byte 12	ASCII Character		’t’ 0x74
0Xxx	Device name byte 13	ASCII Character		’o’ 0x6f
0Xxx	Device name byte 14	ASCII Character		’m’ 0x6d
0Xxx	Device name byte 15	ASCII Character		’ ’ 0x20
0Xxx	Device name byte 16	ASCII Character		’N’ 0x4e
0Xxx	Device name byte 17	ASCII Character		’a’ 0x61
0Xxx	Device name byte 18	ASCII Character		’m’ 0x6d
0Xxx	Device name byte 19	ASCII Character		’e’ 0x65
0Xxx	Device name byte 20	ASCII Character		’ ’ 0x20
0Xxx	Device name byte 21	ASCII Character		’L’ 0x4c
0Xxx	Device name byte 22	ASCII Character		’U’ 0x55
0Xxx	Device name byte 23	ASCII Character		’N’ 0x4e
0Xxx	Device name byte 24	ASCII Character		’0’ 0x30
0Xxx	Unused ROM Space	Amount of unused ROM space varies depending on strings.		0xFF

Note: More than 0X100 bytes of configuration are shown for example only. The AT2LP only supports addresses up to 0xFF.

Programming the EEPROM

There are three methods of programming the EEPROM:

•Stand-alone EEPROM programmer

•Vendor-specific USB commands, listed in Table 12

•In-system programming (for example, bed-of-nails tester)

Any vendor-specific USB write request to the Serial ROM device configuration space simultaneously update internal configuration register values as well. If the I2C device is programmed without vendor specific USB commands, the AT2LP must be synchro- nously reset (toggle RESET#) before configuration data is reloaded.

The AT2LP supports a subset of the ’slow mode’ specification (100 KHz) required for 24LCXXB EEPROM family device support. Features such as ’Multi-Master,’ ’Clock Synchronization’ (the SCL pin is output only), ’10-bit addressing,’ and ’CBUS device support’ are not supported. Vendor-specific USB commands allow the AT2LP to address up to 256 bytes of EEPROM data.

LOAD_CONFIG_DATA

This request enables writes to the AT2LP’s configuration data space. The wIndex field specifies the starting address and the wLength field denotes the data length in bytes.

Document 001-05809 Rev. *A Page 33 of 42

[+] Feedback