hi,

I think that comparing P89LPC922 vs AT89C2051 is not fully correct. The idea is compare it with AT89LP2052/4052.
No, I did not do typpo, Atmel has annouced new Single Clock Core derivatives!

Main features:

• Compatible with MCS®51 Products
• 20 MIPS Throughput at 20 MHz Clock Frequency and 2.7V, 85°C Operating Conditions
• Single Clock Cycle per Byte Fetch
• 2/4K Bytes of In-System Programmable (ISP) Flash Memory
– Serial Interface for Program Downloading
– 32-byte Fast Page Programming Mode
– 32-byte User Signature Array
• 2.4V to 5.5V VCC Operating Range
• Fully Static Operation: 0 Hz to 20 MHz
• 2-level Program Memory Lock
• 256 x 8 Internal RAM
• Hardware Multiplier
• 15 Programmable I/O Lines
• Configurable I/O with Quasi-bidirectional, Input, Push-pull Output, and Open-drain Modes
• Enhanced UART with Automatic Address Recognition and Framing Error Detection
• Enhanced SPI with Double-buffered Send/Receive
• Programmable Watchdog Timer with Software Reset
• 4-level Interrupt Priority
• Analog Comparator with Selectable Interrupt and Debouncing
• Two 16-bit Enhanced Timer/Counters with 8-bit PWM
• Brown-out Detector and Power-off Flag
• Internal Power-on Reset
• Low Power Idle and Power-down Modes
• Interrupt Recovery from Power-down Mode

Both AT89LP2052 and 4052 are 20-pin derivatives (PDIP/SOIC/TSSOP). Moreover, Atmel starts the serie of Single Clock Core, read Flyer about them all.

Please do not consider this post as advertisement, I think this news shoulb be published for all due this is totally new doing from Atmel.

Regards,
Oleg