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Introduction and Setup
MC68HC908MR8
1.3 MC68HC908MR8
Motorola offers several 8-bit and 16-bit microcontroller families that are
perfectly adapted to the requirements of modern industrial and
household applications, combining high-performance and low cost.
This development is based on an MC68HC908MR8 microcontroller, a
member of the M68HC08 Family. The MC68HC908MR8 incorporates a
fault tolerant and flexible 6-channel, 12-bit pulse-width modulator (PWM)
designed to support center and edge-aligned modes with automatic
deadtime insertion and patented deadtime compensation capability.
Write-once protection of key configuration parameters further enhances
motor and consumer safety, the MC68HC908MR8 is appropriate for cost
and space conscious applications including smart appliances, blowers,
fans, refrigeration compressors, office automation products, and electric
lawn equipment.
Refer to Figure 1-1 for a block diagram of the MC68HC908MR8.
Table 1-1 summarizes the MC68HC908MR8 peripherals and memory.
The MC68HC908MR8 is a member of the low-cost, high-performance
M68HC08 Family of 8-bit microcontroller units (MCU). The M68HC08
Family is based on the customer-specified integrated circuit (CSIC)
design strategy. All MCU’s 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 central
processor unit can address 64 Kbytes of memory space.
Table 1-1. MC68HC908MR8 Peripherals and Memory
RAM
(Bytes)
FLASH
(Bytes)
Timer I/O Serial A/D PWM Operating
Voltage
Maximum Bus
Frequency
256 8 K
2-ch + 2-ch
16-bit IC,
OC, or PWM
14 SCI
4-ch to 7-ch
10 bit
6-ch
12 bit
5.0 V 8.0 MHz
BLDC Motor Control Board for Industrial and Appliance Applications
DRM007
MOTOROLA Introduction and Setup 17