原装HOLTEK合泰HT45R37 28SSOP

Features
 Operating voltage:
fSYS=32768Hz: 2.2V~5.5V
fSYS=4MHz: 2.2V~5.5V
fSYS=8MHz: 3.0V~5.5V
fSYS=12MHz: 4.5V~5.5V
 OTP Program Memory: 4K15
 RAM Data Memory: 1608
 27 bidirectional I/O lines
 Three external interrupt input shared with I/O lines
 Two 8-bit programmable Timer/Event Counter
with overflow interrupt and 7-stage prescaler
 External C/R to F converter
 16-Channel Capacitor/Resistor sensor inputs
 Integrated Crystal, IRC, ERC and RTC oscillator
 Fully integrated internal RC oscillator ***ailable with
three frequencies: 4MHz, 8MHz or 12MHz
 Watchdog Timer function
 LIRC or RTC oscillator function for watchdog timer
 PFD and Buzzer for audio frequency generation
 Dual Serial Interfaces: SPI and I2C
 4 operating modes: normal, slow, idle and sleep
 6-level subroutine nesting
 6-channel 12-bit resolution A/D converter
 2-channel 12-bit PWM output shared with I/O line
 Low voltage reset function - 2.1V, 3.15V, 4.2V
 Low voltage detect function - 2.2V, 3.3V, 4.4V
 Bit manipulation instruction
 15-Bit table read instructi***
 63 powerful instructi***
 Up to 0.33s instruction cycle with 12MHz system
clock at VDD=5V
 All instructi*** executed in one or two machine
cycles
 Idle/Sleep mode and wake-up functi*** to reduce
power c***umption
 Time-Base and RTC interrupt
 20-pin DIP/SOP, 24/28-pin SKDIP/SOP/SSOP and
32-pin QFN packages