| Microcontroller information |
|---|
| Type | Microcontroller |
| Manufacturing process | CHMOSIII technology |
| Data bus width | 8 bit |
| Package | 40-pin plastic DIP |
| Speed (MHz) | 3.5 - 12 |
| On-chip RAM (bytes) | 128 |
| On-chip ROM | 4 KB masked ROM |
| On-chip peripherals |
- Four 8-bit I/O ports (32 I/O lines)
- Full-duplex serial port
- Two 16-bit timers/counters
- Oscillator and clock circuits
|
| Low power features |
- Idle mode
- Power down mode
|
| Other features | On-circuit emulator (ONCE) mode |
| Physical memory | 68 KB (4 KB code and 64 KB data) |
| V core (V) | 5 ± 20% |
| Min/Max operating temperature (°C) | 0 - 70 |
| Min/Typical/Max power dissipation (W) | 0.025 (Idle mode) / 0.055 / 0.12 |
Notes:- Earlier versions included ROM protection features: program verification is disabled, external memory accesses are limited to 4 KB
- Later versions are 80C51BH microcontrollers with memory lock bit 1 set.
|
