单片机 裸片 89c2051

8-bit microcontroller with 2k bytes flash
description
the in89c2051 is a low-voltage, high-performance cmos 8-bit microcomputer with
2k bytes of flash programmable and erasable read only memory (perom). the device is
manufactured using atmel’s high density nonvolatile memory technology and is compatible
with the industry standard mcs-51™ instruction set. by combining a versatile 8-bit cpu
with flash on a monolithic chip, the atmel in89c2051 is a powerful microcomputer which
provides a highly flexible and cost effective solution to many embedded control
applications.
the in89c2051 provides the following standard features: 2k bytes of flash, 128
bytes of ram, 15 i/o lines, two 16-bit timer/counters, a five vector two-level interrupt
architecture, a full duplex serial port, a precision analog comparator, on-chip oscillator and
clock circuitry. in addition, the in89c2051 is designed with static logic for operation down
to zero frequency and supports two software selectable power saving modes. the idle
mode stops the cpu while allowing the ram, timer/counters, serial port and interrupt
system to continue functioning. the power down mode saves the ram contents but
freezes the oscillator disabling all other chip functions until the next hardware reset.
features
• compatible with mcs-51™ products
• 2k bytes of reprogrammable flash memory
– endurance: 1,000 write/erase cycles
• 2.7v to 6v operating range
• fully static operation: 0 hz to 24 mhz
• two-level program memory lock
• 128 x 8-bit internal ram
• 15 programmable i/o lines
• two 16-bit timer/counters
• six interrupt sources
• programmable serial uart channel
• direct led drive outputs
• on-chip analog comparator
• low power idle and power down modes