|Category||Microcontrollers => 8 bit|
|Description||Dual Slope A/D 8-bit MCU Product Release --- HT46RU75D-1
The HT46RU75D-1 is a new addition to Holtek’s range of Dual Slope A/D Type MCUs. In meeting with industrial specifications, with an OTP Partial Lock function as well as many other additional features, the device will find excellent use in bridge type sensor measurement applications. These applications could include those that are used to measure pressure, temperature or humidity etc. Products could include scales, tyre pressure gauges, pressure measurement devices, thermometers and humidity meters etc.
|Company||Holtek Semiconductor Inc.|
|Datasheet||Download HT46RU75D-1 datasheet
Operating voltage: Power-down and wake-up functions reduce power
18 bidirectional I/O lines and two ADC inputs Single external interrupt input shared with I/O line One 16-bit and one 18-bit programmable timer/event
Voltage regulator (3.3v) and charge pump Embedded voltage reference generator (1.5V) 16-level subroutine nesting Universal Asynchronous Receiver Transmitter -
LCD driver with or 41´2 segments 8K´16 program memory with partial lock function 160´8 data memory RAM Four differential input channel dual slope Analog to
Bit manipulation instruction 16-bit table read instruction to 0.5ms instruction cycle with 8MHz system clock
63 powerful instructions All instructions or 2 machine cycles Low voltage reset/detector function 100-pin QFP package
Watchdog Timer with regulator power supply Buzzer output External 32768Hz RTC oscillator Integrated RC or crystal oscillator
The an 8-bit high performance, RISC architecture microcontroller device specifically designed for A/D with LCD applications that interface directly to analog signals, such as those from sensors. The advantages of low power consumption, I/O flexibility, timer functions, oscillator options, Dual slope A/D converter, LCD display, UART function, HALT and wake-up functions, watchdog timer, as well as low cost, provide the flexibility to suit a wide range of AD with LCD application possibilities such as sensor signal processing, scales, consumer products, subsystem controllers, etc.
Pin Name PA6/INT PA7 I/O Options Description Bidirectional 8-bit input/output port. Each individual pin on this port can be configured as a wake-up input by a configuration option. Software instructions determine if the pin is a CMOS output or Schmitt trigger input. Configuration options determine which pins on this port have pull-high resistors. The BZ/BZ, PFD, TMR0/TMR1 and INT pins are shared with PA3, PA4/5, and PA6, respectively. Bi-directional 8-bit input/output port. Software instructions determine if the pin is a CMOS output or Schmitt Trigger input. Configuration options determine which pins on the port have pull-high resistors. PB is pin-shared with the A/D input pins. The A/D inputs are selected via software instructions Once selected as an A/D input, the I/O function and pull-high resistor functions are disabled automatically. Bi-directional 8-bit input/output port. Software instructions determine if the pin is a CMOS output or Schmitt Trigger input. Configuration options determine which pins on the port have pull-high resistors. PC0 can be chosen as an I/O pin as a UART TX output by software. PC1 can be chosen as an I/O pin as a UART RX input by software. LCD power supply IC maximum voltage. Connected to VDD, VLCD or V1 LCD voltage pump
VLCD VMAX COM3/SEG40 SEG0~SEG39 VOBGP VOREG VOCHP CHPC1 CHPC2 ADIN ADIP DOPAN, DOPAP, DOPAO, DCHOP DSRR, DSRC, DSCC OSC3 OSC4 RES VDD VSS AVDD AVSS
COM0~COM3 are the LCD common outputs. A configuration option or 1/4 lects the LCD duty-cycle. When either or 1/2 duty is selected, the Duty COM3/SEG40 pin will be configured as SEG40. Segment Output LCD driver outputs for the LCD panel segments. Band gap voltage output pin - for internal use Regulator output - 3.3V Charge pump output - requires external capacitor Charge pump capacitor, positive Charge pump capacitor, negative OP external Resistor Analog output connection. ADIN connects to DOPAN by a resistor. ADIP connects to DOPAP by a resistor. Dual Slope converter pre-stage OPA related pins. DOPAN is the OPA Negative input pin, DOPAP is the OPA Positive input pin, DOPAO is the OPA output pin and DCHOP is the OPA Chopper pins. Dual slope AD converter main function RC circuit. DSRR is the input or reference signal, DSRC is the Integrator negative input, and DSCC is the comparator negative input.
OSC1, OSC2 are connected to an external RC network or crystal for the Crystal or RC internal system clock. If the RC system clock option is selected, pin OSC2 can be used to monitor the system clock at 1/4 frequency. RTC OSC3, OSC4 are connected a 32768Hz crystal to form a real time System Clock clock for timing purposes or to form a system clock. Schmitt trigger reset input, active low Positive power supply Negative power supply, ground Analog positive power supply Analog negative power supply, ground
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