全新原装 c8051f221 逻辑ic

analog peripherals
8-bit adc
-±1/2 lsb inl; no missing codes
-programmable throughput up to 100 ksps
-32 external inputs (each port i/o can be configured as an adc input on-the-fly)
-programmable amplifier gain: 16, 8, 4, 2, 1, 0.5
-data-dependent windowed interrupt generator
-vref from external pin or vdd
two comparators
-programmable hysteresis
-configurable to generate interrupts or reset
vdd monitor and brown-out detector
on-chip jtag debug
-on-chip emulation circuitry facilitates full-speed, non-intrusive, in-circuit emulation
-supports breakpoints, single stepping, watchpoints, inspect/modify memory, and registers
-superior performance to emulation systems using ice-chips, target pods, and sockets
-fully compliant with ieee 1149.1 specification
supply voltage: 2.7 to 3.6 v
-typical operating current: 9 ma at 25 mhz
-typical stop mode current: <0.1 ua
temperature range: –40 to +85 °c
high-speed 8051 μc core
-pipelined instruction architecture; executes 70% of instructions in 1 or 2 system clocks
-up to 25 mips throughput with 25 mhz system clock
-expanded interrupt handler; up to 21 interrupt sources
memory
-256 bytes data ram
-8 kb flash; in-system programmable in 512 byte sectors (512 bytes are reserved)
digital peripherals
-22 port i/o; all are 5 v tolerant
-hardware spi™ and uart serial ports available concurrently
-3 general-purpose 16-bit counter/timers
-dedicated watchdog timer; bidirectional reset
clock sources
-internal programmable oscillator: 2–16 mhz
-external oscillator: crystal, rc, c, or clock
-can switch between clock sources on-the-fly
package
-32-pin lqfp (standard lead and lead-free packages)
ordering part numbers
-lead-free package: c8051f221-gq