HT48R54A General Description
HT48R54A Features
·Operating voltage:
fSYS=32768Hz: 2.2V~5.5V
fSYS=4MHz: 2.2V~5.5V
fSYS=8MHz: 3.3V~5.5V
·4k×15 program memory ROM
·192×8 data memory RAM
·16 bidirectional I/O lines
·24 output lines
·One external interrupt input
·Two internal interrupt
·Two 8 bit programmable timer/event counter
·32768 Real Time Clock function
·6-level subroutine nesting
·Watchdog Timer (WDT)
·Low voltage reset (LVR)
·PFD/Buzzer driver output
·RC/XTAL and 32768Hz crystal oscillator
·Dual clock system offers three operating modes
Normal mode: Both RC/XTAL and 32768Hz clock active
Slow mode: 32768Hz clock only
Idle mode: Periodical wake-up by watchdog timer
overflow
·HALT function and wake-up feature reduce power
consumption
·15-bit table read instructions
·63 powerful instructions
·One instruction cycle: 4 system clock periods
·All instructions in 1 or 2 instruction cycles
·Bit manipulation instructions
·Up to 0.5s instruction cycle with 8MHz system clock
·44/52-pin QFP package
HT48R54A Connection Diagram
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