
General Description
MC68HC908JL8/JK8 MC68HC08JL8/JK8 MC68HC908KL8 Data Sheet, Rev. 3.1
18
Freescale Semiconductor
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11 LED drivers (sink)
–2
× 25mA open-drain I/O with pull-up
Resident routines for in-circuit programming and EEPROM emulation
System protection features:
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Optional computer operating properly (COP) reset, driven by internal RC oscillator
–
Optional low-voltage detection with reset and selectable trip points for 3V and 5V operation
–
Illegal opcode detection with reset
–
Illegal address detection with reset
Master reset pin with internal pull-up and power-on reset
IRQ with schmitt-trigger input and programmable pull-up
20-pin dual in-line package (PDIP), 20-pin small outline integrated package (SOIC), 28-pin PDIP,
28-pin SOIC, 32-pin shrink dual in-line package (SDIP), and 32-pin low-profile quad flat pack
(LQFP)
Specific features of the MC68HC908JL8 in 28-pin packages are:
–
23 general-purpose I/Os only
–
7 keyboard interrupt with internal pull-up
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10 LED drivers (sink)
–
12-channel ADC
–
Timer I/O pins on TIM1 only
Specific features of the MC68HC908JL8 in 20-pin packages are:
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15 general-purpose I/Os only
–
1 keyboard interrupt with internal pull-up
–
4 LED drivers (sink)
–
10-channel ADC
–
Timer I/O pins on TIM1 only
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
1.3 MCU Block Diagram
Figure 1-1 shows the structure of the MC68HC908JL8.