HT49R50A-1

` Operating voltage:
f<sub>SYS</sub>=4MHz: 2.2V~5.5V for HT49R50A-1/HT49C50-1
f<sub>SYS</sub>=8MHz: 3.3V~5.5V for HT49R50A-1/HT49C50-1
f<sub>SYS</sub>=500kHz: 1.2V~2.2V for HT49C50L
` 8 input lines
` 12 bidirectional I/O lines
` Two external interrupt input
` Two 8-bit programmable timer/event counter with PFD (programmable frequency divider) function
` LCD driver with 33*2, 33*3 or 32*4 segments
` 4*15 program memory
` 160*8 data memory RAM
` Real Time Clock (RTC)
` 8-bit prescaler for RTC
` Watchdog Timer
` Buzzer output
` On-chip crystal, RC and 32768Hz crystal oscillator
` HALT function and wake-up feature reduce power consumption
` 6-level subroutine nesting
` Bit manipulation instruction
` 15-bit table read instruction
` Up to 0.5s instruction cycle with 8MHz system clock for HT49R50A-1/HT49C50-1
` Up to s instruction cycle with 500kHz system clock for HT49C50L
` 63 powerful instructions
` All instructions in 1 or 2 machine cycles
` Low voltage reset/detector function for HT49R50A-1/HT49C50-1
` 48-pin SSOP, 100-pin QFP package

Supply Voltage..........................V_SS-0.3V to V_SS+6.0V*
Supply Voltage ........................V_SS-0.3V to V_SS+2.5V**
Storage Temperature ...........................-50 to 125
Input Voltage..............................V_SS-0.3V to V_DD+0.3V
Operating Temperature...........................-40 to 85
Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings may
cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.
* For HT49R50A-1/HT49C50-1
** For HT49C50L

The HT49R50A-1/HT49C50-1/HT49C50L are 8-bit, high performance, RISC architecture microcontroller devices specifically designed for a wide range of LCD applications. The mask version HT49C50-1 and HT49C50L are fully pin and functionally compatible with the OTP version HT49R50A-1 device. The HT49C50L is a low voltage version, with the ability to operate at a minimum power supply of 1.2V, making it suitable for single cell battery applications.

The advantages of low power consumption, I/O flexibility, programmable frequency divider, timer functions, oscillator options, HALT and wake-up functions and buzzer driver in addition to a flexible and configurable LCD interface, enhance the versatility of HT49R50A-1 to control a wide range of LCD-based application possibilities such as measuring scales, electronic multimeters, gas meters, timers, calculators, remote controllers and many other LCD-based industrial and home appliance applications.