mc68hc908qb4 Freescale Semiconductor, Inc, mc68hc908qb4 Datasheet - Page 17

• Manufacturer Part Number: mc68hc908qb4
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 1
General Description
1.1 Introduction
The MC68HC908QB8 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.
1.2 Features
Features include:
1. See
2. No security feature is absolutely secure. However, Freescale’s strategy is to make reading or copying the FLASH difficult for
Freescale Semiconductor
unauthorized users.
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MC68HC908QB8
MC68HC908QB4
MC68HC908QY8
18.11 Oscillator Characteristics
High-performance M68HC08 CPU core
Fully upward-compatible object code with M68HC05 Family
5-V and 3-V operating voltages (V
8-MHz internal bus operation at 5 V, 4-MHz at 3 V
Trimmable internal oscillator
–
–
–
–
Software selectable crystal oscillator range, 32–100 kHz, 1–8 MHz, and 8–32 MHz
Software configurable input clock from either internal or external source
Auto wakeup from STOP capability using dedicated internal 32-kHz RC or bus clock source
On-chip in-application programmable FLASH memory
–
–
–
Device
Software selectable 1 MHz, 2 MHz, or 3.2 MHz internal bus operation
8-bit trim capability
± 25% untrimmed
Trimmable to approximately 0.4%
Internal program/erase voltage generation
Monitor ROM containing user callable program/erase routines
FLASH security
Memory Size
FLASH/RAM
8K/256 bytes
4K/128 bytes
8K/256 bytes
(2)
Table 1-1. Summary of Device Variations
for internal oscillator specifications
MC68HC908QB8 Data Sheet, Rev. 2
DD
10 channel, 10 bit
10 channel, 10 bit
4 channel, 10 bit
)
(1)
ADC
0.4
16-Bit Timer
Channels
4
4
2
ESCI
Yes
Yes
No
SPI
Yes
Yes
No
16 pins
16 pins
16 pins
Count
Pin
17