General Description
On-chip memory of the MC68HC705K1 includes 504 bytes of erasable,
programmable read-only memory (EPROM). In packages without the
transparent window for EPROM erasure, the 504 EPROM bytes serve
as one-time programmable read-only memory (OTPROM).
Features
Features of the MCU include:
? Popular M68HC05 CPU
? Memory-mapped input/output (I/O) registers
? 504 bytes of EPROM/OTPROM, including eight user vector
locations
? 32 bytes of user random-access memory (RAM)
? 64-bit personality EPROM
? 10 bidirectional I/O pins with these features:
? Software programmable pulldown devices
? Four I/O pins with 8-mA current sinking capability
? Four I/O pins with maskable external interrupt capability
? Hardware mask and flag for external interrupts
? Fully static operation with no minimum clock speed
? On-chip oscillator with connections for:
? Crystal or ceramic resonator
? Mask-optional 2-pin or 3-pin resistor-capacitor (RC) oscillator
? Computer operating properly (COP) watchdog
? 15-bit multifunction timer with real-time interrupt circuit
? Power-saving stop, wait, halt, and data-retention modes
? 8 ? 8 unsigned multiply instruction
? Illegal address reset
? Low-voltage reset