HT48CA0

HT48CA0 8-bit Microcontroller Features Operating voltage: 2.2V~3.6V Ten bidirectional I/O lines Six schmitt trigger input lines One carrier output (1/2 or 1/3 duty) On-chip crystal and RC oscillator Watchdog timer 1K×14 program ROM 32×8 data RAM Low voltage reset function Halt function and wake-up feature reduce power consumption 62 powerful instructions Up to 1µs instruction cycle with 4MHz system clock All instructions in 1 or 2 machine cycles 14-bit table read instructions One-level subroutine nesting Bit manipulation instructions General Description The HT48CA0 is an 8-bit high performance RISC-like microcontroller specifically designed for multiple I/O product applications. The device is particularly suitable for use in products such as remote controllers, fan/light controllers, washing machine controllers, scales, toys and various subsystem controllers. A halt feature is included to reduce power consumption. Pin Assignment 1 23rd July ’98 HT48CA0 Block Diagram 2 23rd July ’98 HT48CA0 Pad Description Pad No. Pad Name I/O Mask Option Function 2-bit bidirectional input/output lines with pull-high resistors. Each bit can be determined as NMOS output or schmitt trigger input by software instructions. Each bit can also be configured as wake-up input by mask option. Level or carrier output pin PC0 can be set as CMOS output pin or carrier output pin by mask option. Positive power supply Negative power supply, GND Schmitt trigger reset ...