The MC9S08RC/RD/RE/RG are members of the low-cost, high-performance HCS08 Family of 8-bit microcontroller units (MCUs). All MCUs in this family use the enhanced HCS08 core and are available with a variety of modules, memory sizes, memory types, and package types.

Features of the MC9S08RC/RD/RE/RG Family of devices

HCS08 CPU (Central Processor Unit)

• Object code fully upward-compatible with M68HC05 and M68HC08 Families
• HC08 instruction set with added BGND instruction
• Support for up to 32 interrupt/reset sources
• Power-saving modes: wait plus three stops

 

On-Chip Memory

• On-chip in-circuit programmable FLASH memory with block protection and security option
• On-chip random-access memory (RAM)

 

Oscillator (OSC)

• Low power oscillator capable of operating from crystal or resonator from 1 to 16 MHz
• 8 MHz internal bus frequency

 

Analog Comparator (ACMP1)

• On-chip analog comparator with internal reference (ACMP1)
• Full rail-to-rail supply operation
• Option to compare to a fixed internal bandgap reference voltage

 

Serial Communications Interface Module (SCI1)

• Full-duplex, standard non-return-to-zero (NRZ) format
• Double-buffered transmitter and receiver with separate enables
• Programmable 8-bit or 9-bit character length
• Programmable baud rates (13-bit modulo divider)

 

Serial Peripheral Interface Module (SPI1)

• Master or slave mode operation
• Full-duplex or single-wire bidirectional option
• Programmable transmit bit rate
• Double-buffered transmit and receive
• Serial clock phase and polarity options
• Slave select output
• Selectable MSB-first or LSB-first shifting

 

Timer/Pulse-Width Modulator (TPM1)

• 2-channel, 16-bit timer/pulse-width modulator (TPM1) module that can operate as a free-running counter, a modulo counter, or an up-/down-counter when the TPM is configured for center-aligned PWM
• Selectable input capture, output compare, and edge-aligned or center-aligned PWM capability on each channel

 

Keyboard Interrupt Ports (KBI1, KBI2)

• Providing 12 keyboard interrupts
• Eight with falling-edge/low-level plus four with selectable polarity
• KBI1 inputs can be configured for edge-only sensitivity or edge-and-level sensitivity

 

Carrier Modulator Timer (CMT)

• Dedicated infrared output (IRO) pin
• Drives IRO pin for remote control communications
• Can be disconnected from IRO pin and used as output compare timer
• IRO output pin has high-current sink capability

 

Development Support

• Background debugging system (see also the Development Support chapter)
• Breakpoint capability to allow single breakpoint setting during in-circuit debugging (plus two more breakpoints in on-chip debug module)
• Debug module containing two comparators and nine trigger modes. Eight deep FIFO for storing change-of-flow addresses and event-only data. Debug module supports both tag and force breakpoints.

 

Port Pins

• Eight high-current pins (limited by maximum package dissipation)
• Software selectable pullups on ports when used as input. Selection is on an individual port bit basis. During output mode, pullups are disengaged.
• 39 general-purpose input/output (I/O) pins, depending on package selection

 

Package Options

• 28-pin plastic dual in-line package (PDIP)
• 28-pin small outline integrated circuit (SOIC)
• 32-pin low-profile quad flat package (LQFP)
• 44-pin low-profile quad flat package (LQFP)
• 48-pin quad flat package (QFN)

 

System Protection

• Optional computer operating properly (COP) reset
• Low-voltage detection with reset or interrupt
• Illegal opcode detection with reset
• Illegal address detection with reset (some devices don’t have illegal addresses)