VSS Circuit ground potential VCC Supply voltage during normal Idle and Power-Down operation nominally a5V g10% for 8XC51SL a3 3V g 0 3V for Low Voltage 8XC51SL PCDB0 - 7 I O Host interface data bus An 8-bit bidirectional port for data transfers between the host processor and the keyboard controller WRL I The act.
| Part Number | Manufacturer | Description |
|---|---|---|
| 87C51 | Intel Corporation | CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER |
| 87C51FA | Intel Corporation | CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER |
| 87C51FB | Intel Corporation | CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLERS |
| 87C51GB | Intel Corporation | CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER |
| 87C58 | Advanced Analogic Technologies | CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER |
