MC68HC08JL8_03 Datasheet, PDF (2/8 Pages) Freescale Semiconductor, Inc – Microcontrollers

HC908JL8AD/D
Freescale Semiconductor, Inc.
MCU Block Diagram Figure 1 shows the block diagram of the MC68HC08JL8.
Memory Map
The MC68HC08JL8 has 8,192 bytes of user ROM from $DC00 to $FBFF, and
36 bytes of user ROM vectors from $FFDC to $FFFF. On the MC68HC908JL8,
these memory locations are FLASH memory.
Figure 2 shows the memory map of the MC68HC08JL8.
INTERNAL BUS
CPU
REGISTERS
M68HC08 CPU
ARITHMETIC/LOGIC
UNIT (ALU)
CONTROL AND STATUS REGISTERS — 64 BYTES
USER ROM — 8,192 BYTES
USER RAM — 256 BYTES
MONITOR ROM — 447 BYTES
USER ROM VECTORS — 36 BYTES
OSC1
Â¥ _OSC2/RCCLK
CRYSTAL OSCILLATOR
RC OSCILLATOR
INTERNAL OSCILLATOR
* RST
* IRQ
SYSTEM INTEGRATION
MODULE
EXTERNAL INTERRUPT
MODULE
KEYBOARD INTERRUPT
MODULE
8-BIT ANALOG-TO-DIGITAL
CONVERTER MODULE
2-CHANNEL TIMER INTERFACE
MODULE 1
2-CHANNEL TIMER INTERFACE
MODULE 2
BREAK
MODULE
SERIAL COMMUNICATIONS
INTERFACE MODULE
POWER-ON RESET
MODULE
LOW-VOLTAGE INHIBIT
MODULE
COMPUTER OPERATING
PROPERLY MODULE
PTA7/KBI7**^{‡ #}
PTA6/KBI6**^Â¥
PTA5/KBI5**^‡
PTA4/KBI4**^‡
PTA3/KBI3**^‡
PTA2/KBI2**^‡
##
PTA1/KBI1**^‡
PTA0/KBI0**^‡
PTB7/ADC7
PTB6/ADC6
PTB5/ADC5
PTB4/ADC4
PTB3/ADC3
PTB2/ADC2
PTB1/ADC1
PTB0/ADC0
ADC12/T2CLK ^#
PTD7/RxD**^†‡
PTD6/TxD**^†‡
PTD5/T1CH1
PTD4/T1CH0
PTD3/ADC8^‡
PTD2/ADC9^‡
PTD1/ADC10
##
PTD0/ADC11
PTE1/T2CH1
#
PTE0/T2CH0
VDD
POWER
VSS
ADC REFERENCE
* Pin contains integrated pull-up device.
** Pin contains programmable pull-up device.
† 25mA open-drain if output pin.
‡ LED direct sink pin.
Â¥ Shared pin: OSC2/RCCLK/PTA6/KBI6.
# Pins available on 32-pin packages only.
## Pins available on 28-pin and 32-pin packages only.
Shaded blocks indicate differences to MC68HC908JL8
Figure 1. MC68HC08JL8 Block Diagram
Addendum to MC68HC908JL8 Technical Data
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