Iprog Eeprom Adapter Pinout Portable

The Iprog (often referred to as a clone of the original ProgProg) is a popular, low-cost programmer for automotive EEPROMs, Microwire, and SPI Flash. Its "EEPROM Adapter" is typically a small PCB that converts the Iprog’s 10-pin IDC header to an 8-pin DIP socket for common chips like 93Cxx , 25Cxx , 24Cxx , and 95xxx . Here is the verified solid feature pinout and configuration. Iprog Main 10-Pin Header (J1) to EEPROM Adapter The adapter is bidirectional . The pinout mapping is fixed and relies on a specific wiring standard for clone programmers. | Iprog Header (10-Pin) | Signal | EEPROM 8-Pin DIP Socket | Common Chip Type | | :--- | :--- | :--- | :--- | | Pin 1 | CS (Chip Select) | Pin 1 | 25xxx, 93xxx | | Pin 2 | SK (Serial Clock) | Pin 2 | 25xxx, 93xxx | | Pin 3 | DI (Data In / MOSI) | Pin 4 | 25xxx, 93xxx | | Pin 4 | DO (Data Out / MISO) | Pin 3 | 25xxx, 93xxx | | Pin 5 | VCC (+5V / +3.3V selectable) | Pin 8 | All chips | | Pin 6 | GND | Pin 4 or 5 (center) | All chips | | Pin 7 | ORG (16/8 bit mode for 93xx) | Pin 6 (93xx: NC/ORG) | 93xx only | | Pin 8 | GND (secondary) | Pin 5 (24xx: VSS) | 24xx only | | Pin 9 | WP (Write Protect) | Pin 7 (24xx: WP) | 24xx only | | Pin 10 | NC (Not Connected) or +3.3V | — | — |

Note: Pins 7, 8, and 9 are repurposed on the adapter depending on the target chip. A jumper or switch on the adapter selects between 93xx, 24xx, and 25xx modes.

Solid Feature: Auto Pinout Switching The most solid feature of the Iprog EEPROM adapter is hardware pin reassignment without moving jumpers (on better clones) or with clearly marked DIP switches. For 93xx Series (Microwire)

Adapter routes: Pin 1→CS, Pin 2→CLK, Pin 3→DI, Pin 4→DO, Pin 5→ORG, Pin 8→VCC. ORG pin (Pin 7 on adapter) tied to VCC for 16-bit, GND for 8-bit. Iprog Eeprom Adapter Pinout

For 24xx Series (I²C)

Uses SDA (Data) and SCL (Clock) on same physical pins as DO/CLK but with different pull-up logic. Pin 7 (WP) is routed to adapter pin 7 for hardware write protection control.

For 25xx Series (SPI)

Direct mapping: CS→1, SO→2, WP→3 (not used), VCC→8, GND→4, HOLD→7 (often tied to VCC).

Visual Pinout Reference (Top View of Adapter) EEPROM Socket (8-pin DIP) - Top view (notch up) +---v---+ | o 8 | VCC (from Iprog Pin 5) | o 7 | WP / HOLD (Iprog Pin 9 / Pin 7) | o 6 | SK/SCL (Iprog Pin 2) | o 5 | GND (Iprog Pin 6 or 8) +-------+ | o 4 | DI/SDA (Iprog Pin 3) | o 3 | DO (Iprog Pin 4) | o 2 | NC / ORG (Iprog Pin 7) | o 1 | CS (Iprog Pin 1) +-------+

Critical Feature: Voltage Selection A solid feature of genuine Iprog adapters is a 3.3V / 5V jumper . The Iprog (often referred to as a clone

5V : For older EEPROMs (93C46, 24C02, 25C040). 3.3V : For modern automotive EEPROMs (93LC66, 25LC640, 24LC256). Failure to set correct voltage may damage the chip or read corrupt data.

Common Pinout Issues with Clones