EEPROM Chip Pinout & SOP8 Clamp Flashing Guide
Prevent burning memory chips or corrupting odometer dumps. Visual Pin 1 dot orientation, wiring assignments, and safe 3.3V jumper settings for CH341A, RT809H, and T48.
93Cxx Series (Microwire 3-Wire / 4-Wire Serial EEPROM)
Supported Motorcycles: Bajaj Pulsar 150/180/220, Suzuki GSX-R150, Hero Glamour, KTM Duke 200/390
SOIC-8 Top View Orientation
Red Dot = Pin 1: Always align the RED wire on your SOP8 test clamp with Pin 1.
Pin Function Matrix
Standard pinout assignments for programming clamp
| Pin | Signal Name | Function & Wire Description |
|---|---|---|
| 1 | CS | Chip Select (Active High) |
| 2 | SK / CLK | Serial Clock Input |
| 3 | DI | Serial Data Input |
| 4 | DO | Serial Data Output |
| 5 | GND | Ground (0V Reference) |
| 6 | ORG | Memory Organization (GND = x8 bit, VCC = x16 bit) |
| 7 | NC / PE | No Connection / Program Enable |
| 8 | VCC | Power Supply (+3.3V / +5.0V) |
In-Circuit Clamp Flashing Diagnostics & Tips
Byte-Swapped Dump: In 93Cxx chips, read in 16-bit (WORD) mode rather than 8-bit (BYTE) mode to ensure odometer calculation matches.
Cannot detect on CH341A: Standard CH341A Black Edition requires an SOP8 93Cxx converter board because pin layout is not SPI standard.