8-bit MCS-8051 microcontroller, 2 KB, 20 MHz, DIP-20

AT89LP4052 8-bit microcontroller with 4K byte flash

Description:
The AT89LP2052/LP4052 is a low-power, high-performance CMOS 8-bit microcontroller with 2/4K byte in-system programmable flash memory. The device is manufactured using Atmel's high-density non-volatile memory technology and is compatible with the industry-standard MCS-51 instruction set. The AT89LP2052/LP4052 is built around an improved CPU core that can retrieve a single byte from memory at each clock cycle. In the classic 8051 architecture, each call required 6 clock cycles, so the commands had to be executed in 12, 24, or 48 clock cycles. In the AT89LP2052/LP4052 CPU, the commands require only 1 to 4 clock cycles, which results in a 6 to 12 times higher throughput than the standard 8051. Seventy percent of the instructions require only as many clock cycles as they have bytes to execute, and most of the remaining instructions require only one additional clock cycle. The extended CPU core is capable of achieving a throughput of 20 MIPS, while the classic 8051 CPU can deliver only 4 MIPS at the same power consumption. Conversely, the new CPU core runs at much lower speeds at the same throughput as the classic 8051, significantly reducing power consumption.

Features:
• Compatible with MCS®51 products
• 20 MIPS throughput at 20 MHz clock frequency + 2.4V, 85°C operating conditions
• Single clock cycle per byte of fetch
• 2/4K bytes of system programmable flash memory (ISP)
- Serial interface for program download
- 32-byte fast-side programming mode
- 32-byte user signature array
• 2.4V to 5.5V VCC operating range
• Fully static operation: 0 Hz to 20 MHz
• 2-stage program memory lock
• 256 x 8 internal RAM
• Hardware multiplier
• 15 programmable I/O lines
• Configurable I/O with quasi-bi-directional, input, push-pull output and open drain modes
• Advanced UART with automatic address detection and framing error detection
• Advanced SPI with double-buffered send/receive
• Programmable watchdog timer with software reset
• 4-step interrupt priority
• Analog comparator with selectable interruption and debouncing
• Two advanced 16-bit timers/counters with 8-bit PWM
• Brown-out detector and power off marker
• Internal power-on reset
• Low power idle and shutdown modes
• Interrupt recovery from shutdown mode