Freescale Semiconductor MC68HC908MR32 Manual Do Utilizador

Freescale Semiconductor

17

The MC68HC908MR32 is a member of the low-cost, high-performance M68HC08 Family of 8-bit 
microcontroller units (MCUs). All MCUs in the family use the enhanced M68HC08 central processor unit 
(CPU08) and are available with a variety of modules, memory sizes and types, and package types.

The information contained in this document pertains to the MC68HC908MR16 with the exceptions shown 
in 

.

Features include:

•

High-performance M68HC08 architecture

•

Fully upward-compatible object code with M6805, M146805, and M68HC05 Families

•

8-MHz internal bus frequency

•

On-chip FLASH memory with in-circuit programming capabilities of FLASH program memory: 

MC68HC908MR32 — 32 Kbytes
MC68HC908MR16 — 16 Kbytes

•

On-chip programming firmware for use with host personal computer

•

FLASH data security

(1)

•

768 bytes of on-chip random-access memory (RAM)

•

12-bit, 6-channel center-aligned or edge-aligned pulse-width modulator (PWMMC)

•

Serial peripheral interface module (SPI)

•

Serial communications interface module (SCI)

•

16-bit, 4-channel timer interface module (TIMA)

•

16-bit, 2-channel timer interface module (TIMB)

•

Clock generator module (CGM)

•

Low-voltage inhibit (LVI) module with software selectable trip points 

•

10-bit, 10-channel analog-to-digital converter (ADC)

•

System protection features:
–

Optional computer operating properly (COP) reset

–

Low-voltage detection with optional reset

–

Illegal opcode or address detection with optional reset

–

Fault detection with optional PWM disabling

1. No security feature is absolutely secure. However, Freescale’s strategy is to make reading or copying the FLASH difficult for 

unauthorized users.