HT46R74D-1 Datasheet, PDF (1/48 Pages) Holtek Semiconductor Inc – Dual Slope A/D Type MCU with LCD

HT46R74D-1
Dual Slope A/D Type MCU with LCD
Technical Document
· Tools Information
· FAQs
· Application Note
Features
· Operating voltage:
f_SYS = 4MHz: 2.2V~5.5V
f_SYS = 8MHz: 3.3V~5.5V
· 10 bidirectional I/O lines and two ADC inputs
· Two external interrupts inputs shared with I/O lines
· One 8-bit and one 18-bit programmable timer/event
counter with overflow interrupt and pre-scaler
· LCD driver with 15´4, 16´3 or 16´2 segments
· 4K´15 program memory with partial lock function
· 96´8 data memory RAM
· Single differential input channel dual slope Analog to
Digital Converter with Operational Amplifier.
· Watchdog Timer with regulator power
· Buzzer output
· External 32768Hz RTC oscillator
· Integrated RC or crystal oscillator
· Power-down and wake-up functions reduce power
consumption
· Internal 3.3V Voltage regulator and charge pump
· Embedded voltage reference generator - 1.5V
· 6-level subroutine nesting
· Bit manipulation instruction
· 15-bit table read instruction
· Up to 0.5ms instruction cycle with 8MHz system clock
at V_DD=5V
· 63 powerful instructions
· All instructions in 1 or 2 machine cycles
· Low voltage reset/detector function
· 56-pin SSOP package
General Description
The HT46R74D-1 is an 8-bit high performance, RISC
architecture microcontroller device specifically de-
signed for A/D with LCD applications that interface di-
rectly to analog signals, such as those from sensors.
The advantages of low power consumption, I/O flexibil-
ity, timer functions, oscillator options, Dual slope A/D
converter, LCD display, HALT and wake-up functions,
watchdog timer, as well as low cost, enhance the versa-
tility of these devices to suit for a wide range of AD with
LCD application possibilities such as sensor signal pro-
cessing, scales, consumer products, subsystem con-
trollers, etc.
Rev. 1.30
1
June 7, 2007