sq50-re

The FT240X EEPROM contains USB descriptor data, as well as a few magic bytes (see USB protocol). It is 256 bytes (128 16-bit words) in size, and is read in units of 16 bits. Its contents are:

00000000  00 00 03 04 d0 7f 00 10  80 c8 08 00 00 00 a0 12  |................|
00000010  b2 1e d0 1c 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000020  04 00 00 00 62 a7 7e 03  9f f5 f6 74 f4 01 00 00  |....b.~....t....|
00000030  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000040  88 88 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000050  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00000080  56 36 a9 c9 01 00 6a 6c  ad 88 30 00 00 00 00 00  |V6....jl..0.....|
00000090  00 00 00 01 44 4f 51 41  34 45 30 31 00 00 00 00  |....DOQA4E01....|
000000a0  12 03 49 00 4b 00 41 00  4c 00 4f 00 47 00 49 00  |..I.K.A.L.O.G.I.|
000000b0  43 00 1e 03 53 00 63 00  61 00 6e 00 61 00 51 00  |C...S.c.a.n.a.Q.|
000000c0  75 00 61 00 64 00 20 00  53 00 51 00 35 00 30 00  |u.a.d. .S.Q.5.0.|
000000d0  1c 03 31 00 30 00 30 00  33 00 30 00 35 00 30 00  |..1.0.0.3.0.5.0.|
000000e0  30 00 30 00 35 00 34 00  38 00 32 00 00 00 00 00  |0.0.5.4.8.2.....|
000000f0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 6a 3e  |..............j>|
00000100  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
*
00000800

Parsed FTDI config output (using libftdi):

VID:     0x0403
PID:     0x7fd0
Release: 0x1000
Bus Powered: 400 mA
Manufacturer: IKALOGIC
Product:      ScanaQuad SQ50
Serial:       1003050005482
Checksum      : 3e6a
PNP: 1
Channel A has Mode UART
DBUS has 4 mA drive
CBUS has 4 mA drive
CBUS0 Function: TRISTATE
CBUS1 Function: TRISTATE
CBUS2 Function: TRISTATE
CBUS3 Function: TRISTATE

The proprietary libftd2xx calls it an "X-series" device, while libftdi thinks it is an FT230X.

"User data" starts at 0x24 (0x12 in 16-bit word units), which is where the 3-byte "magic unlock code" resides.