Описание
The devices are Single-Chip 8-Bit Microcontrollers manufactured in an advanced CMOS process and are derivatives of the 80C51 microcontroller family. The instruction set is 100 pct compatible with the 80C51 instruction set. The devices support 6-clock/12-clock mode selection by programming an OTP bit (OX2) using parallel programming. In addition, an SFR bit (X2) in the clock control register (CKCON) also selects between 6-clock/12-clock mode. The devices also have four 8-bit I/O ports, three 16-bit timer/event counters, a multi-source, four-priority-level, nested interrupt structure, an enhanced UART and on-chip oscillator and timing circuits. The added features of the P8xC654X2 make it a powerful microcontroller for applications that require pulse width modulation, high-speed I/O and up/down counting capabilities such as motor control.
- 80C51 Central Processing Unit
- 16 kbytes OTP
- 256 byte RAM
- Boolean processor
- Fully static operation
- Low voltage (2.7 V to 5.5 V at 16 MHz) operation
- 12-clock operation with selectable 6-clock operation (via software or via parallel programmer)
- Memory addressing capability
- Up to 64 kbytes ROM and 64 kbytes RAM
- Power control modes:
- Clock can be stopped and resumed
- Idle mode
- Power-down mode
- CMOS and TTL compatible
- Two speed ranges at VCC = 5 V
- 0 to 30 MHz with 6-clock operation
- 0 to 33 MHz with 12-clock operation
- Parallel programming with 87C51 compatible hardware interface to programmer
- RAM expandable externally to 64 kbytes
- PLCC and LQFP packages
- Extended temperature ranges
- Dual Data Pointers
- Security bits (3 bits)
- Encryption array – 64 bytes
- Seven interrupt sources
- Four interrupt priority levels
- Four 8-bit I/O ports
- Full-duplex enhanced UART
- Framing error detection
- Automatic address recognition
- Three 16-bit timers/counters T0, T1 (standard 80C51) and additional T2 (capture and compare)
- Programmable clock-out pin
- Asynchronous port reset
- Low EMI (inhibit ALE, slew rate controlled outputs, and 6-clock mode)
- Wake-up from power-down by an external interrupt
- Watchdog timer
