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HT45R37 Datasheet(PDF) 1 Page - Holtek Semiconductor Inc |
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HT45R37 Datasheet(HTML) 1 Page - Holtek Semiconductor Inc |
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1 / 100 page  HT45R37 TinyPowerTM C/R-F Type 8-Bit OTP MCU Rev. 1.10 1 January 29, 2010 General Description The HT45R37 is a TinyPower TM C/R to F Type 8-bit high performance RISC architecture microcontroller. As a C/R to F type of MCU, the device can interface to 16 external C or R type sensors and convert their values to a fre- quency value for processing. In addition its internal A/D converter allows the device to interface directly to analog signals and its integrated dual channel Pulse Width Modu- lators allows control of external motors, LEDs etc. With their fully integrated SPI and I 2C functions, design- ers are provided with a means of easy communication with external peripheral hardware. The benefits of inte- grated A/D, C/R to F converter, and PWM functions, in addition to low power consumption, high performance, I/O flexibility and low-cost, provides the device with the versatility for a wide range of products in the home appli- ance and industrial application areas. Some of these products could include electronic metering, environmen- tal monitoring, handheld instruments, electronically con- trolled tools, motor driving in addition to many others. The unique Holtek TinyPower technology also gives the devices extremely low current consumption characteris- tics, an extremely important consideration in the present trend for low power battery powered applications. The usual Holtek MCU features such as power down and wake-up functions, oscillator options, programmable frequency divider, etc. combine to ensure user applica- tions require a minimum of external components. 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: 4K´15 · RAM Data Memory: 160´8 · 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 available 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 instructions · 63 powerful instructions · Up to 0.33ms instruction cycle with 12MHz system clock at VDD=5V · All instructions executed in one or two machine cycles · Idle/Sleep mode and wake-up functions to reduce power consumption · Time-Base and RTC interrupt · 20-pin DIP/SOP, 24/28-pin SKDIP/SOP/SSOP, 32-pin QFN and 44-pin QFP packages Technical Document · Tools Information · FAQs · Application Note - HA0075E MCU Reset and Oscillator Circuits Application Note |
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