Datasheet

ManualsBrandsNXP SEMICONDUCTORS ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller SOIC 16 8-Bit 8 MHz I/O number 13

General Description

MC68HC908QB8 Data Sheet, Rev. 3

18 Freescale Semiconductor

• On-chip random-access memory (RAM)

• Enhanced serial communications interface (ESCI) module

• Serial peripheral interface (SPI) module

• 4-channel, 16-bit timer interface (TIM) module

• 10-channel, 10-bit analog-to-digital converter (ADC) with internal bandgap reference channel

(ADC10)

• Up to 13 bidirectional input/output (I/O) lines and one input only:

– Six shared with KBI

– Ten shared with ADC

– Four shared with TIM

– Two shared with ESCI

– Four shared with SPI

– One input only shared with IRQ

– High current sink/source capability on all port pins

– Selectable pullups on all ports, selectable on an individual bit basis

– Three-state ability on all port pins

• 6-bit keyboard interrupt with wakeup feature (KBI)

– Programmable for rising/falling or high/low level detect

• Low-voltage inhibit (LVI) module features:

– Software selectable trip point

• System protection features:

– Computer operating properly (COP) watchdog

– Low-voltage detection with reset

– Illegal opcode detection with reset

– Illegal address detection with reset

• External asynchronous interrupt pin with internal pullup (IRQ

) shared with general-purpose input

• Master asynchronous reset pin with internal pullup (RST

) shared with general-purpose input/output

(I/O) pin

• Memory mapped I/O registers

• Power saving stop and wait modes

• MC68HC908QB8, MC68HC908QB4 and MC68HC908QY8 are available in these packages:

– 16-pin plastic dual in-line package (PDIP)

– 16-pin small outline integrated circuit (SOIC) package

– 16-pin thin shrink small outline packages (TSSOP)

Features of the CPU08 include the following:

• Enhanced HC05 programming model

• Extensive loop control functions

• 16 addressing modes (eight more than the HC05)

• 16-bit index register and stack pointer

• Memory-to-memory data transfers

• Fast 8 × 8 multiply instruction

• Fast 16/8 divide instruction

• Binary-coded decimal (BCD) instructions

• Optimization for controller applications

• Efficient C language support