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Honda PT6 and PK3 ECU Technical Specifications
Technical reference for Honda PT6 and PK3 series ECUs, detailing MCU specifications and PROM configurations for OBD-era Prelude and Accord models.
This document outlines the hardware configuration for specific Honda PT6 and PK3 series ECUs found in mid-90s Accord and Prelude models.
Hardware Overview
The following ECU variants utilize the OKI 66911 MCU architecture paired with external 256Kbit PROM storage.
PT6-A51 (Accord)
- MCU: OKI 66911
- Memory: External 256Kbit PROM
PK3-A00 (1994 Prelude Si, 1.6L DOHC)
- MCU: OKI 66911
- Memory: External 256Kbit PROM
- Logic Components: 74HC373 latch
Note
The 74HC373 octal transparent latch is utilized in the PK3-A00 architecture to facilitate address/data bus multiplexing required by the 66911 MCU.
Technical Reference
| ECU Model | Application | MCU | Memory Type |
|---|---|---|---|
| PT6-A51 | Accord | OKI 66911 | 256Kbit PROM |
| PK3-A00 | 1994 Prelude Si | OKI 66911 | 256Kbit PROM |
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