General Description
●Introduction
●The Motorola MC68HC705JJ7 and MC68HC705JP7 are EPROM versions of the MC68HC05JJ/JP Family of microcontrollers.
●Features
●• Low-Cost, HC05 Core MCU in 20-Pin Package (MC68HC705JJ7) or 28-Pin Package (MC68HC705JP7)
●• 6160 Bytes of User EPROM (Including 16 Bytes of User Vectors)
●• 224 Bytes of Low-Power User RAM (4 Transistors)
●• 64 Bits of Personality EPROM (Serial Access)
●• 16-Bit Programmable Timer with Input Capture and Output Compare
●• 15-Stage Core Timer Including 8-Bit Free-Running Counter and 4-Stage Selectable Real-Time Interrupt Generator
●• Simple Serial Input/Output Port (SIOP) with Interrupt Capability
●• Two Voltage Comparators, One of Which Can be Combined with the 16-Bit Programmable Timer to Create a 4-Channel, SingleSlope A/D Converter
●• Output of Voltage Comparator Can Drive Port Pin PB4 Directly Under Software Control
●• 14 I/O Lines (MC68HC705JJ7) or 22 I/O Lines (MC68HC705JP7) Including High-Source/Sink Current Capability on 6 I/O Pins (MC68HC705JJ7) or 14 I/O Pins (MC68HC705JP7)
●• Programmable 8-Bit Mask Option Register (MOR) to Select Mask Options Found in ROM-Based Versions
●• MOR Selectable Software Programmable Pulldowns on All I/O Pins and Keyboard Scan Interrupt on Four I/O Pins
●• Software Mask and Request Bit for IRQ Interrupt with MOR Selectable Sensitivity on IRQ Interrupt (Edge- and Level-Sensitive or Edge-Only)
●• On-Chip Oscillator with Device Option of Crystal/Ceramic Resonator or RC Operation and MOR Selectable Shunt Resistor, Approximately 2 MΩ
●• Internal Oscillator for Lower-Power Operation, Approximately 100 kHz (500 kHz Selected as Device Option)
●• EPROM Security Bit1 to Aid in Locking Out Access to Programmable EPROM array
●• MOR Selectable (COP) Watchdog System
●• Power-Saving Stop and Wait Mode Instructions (MOR Selectable STOP Conversion to Halt and Option for Fast 16-Cycle Restart, and Power-On Reset)
●• On-Chip Temperature Measurement Diode
●• MOR Selectable Low-Voltage Inhibit to Reset CPU in Low-Voltage Conditions
●• Illegal Address Reset
●• Internal Steering Diode and Pullup Device on RESET Pin to VDD
