mc68hc908gr8vp Freescale Semiconductor, Inc, mc68hc908gr8vp Datasheet - Page 21

• Manufacturer Part Number: mc68hc908gr8vp
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

1.3 MCU Block Diagram
Figure 1-1
Freescale Semiconductor
† Ports are software configurable with pullup device if input port.
‡ Higher current drive port pins
* Pin contains integrated pullup device
V
V
FLASH PROGRAMMING (BURN-IN) ROM — 544 BYTES
DDAD /
SSAD
CONTROL AND STATUS REGISTERS — 64 BYTES
MC68HC908GR8 USER FLASH — 7680 BYTES
CGMXFC
MC68HC908GR4 USER FLASH — 4096BYTES
USER FLASH VECTOR SPACE — 36 BYTES
REGISTERS
/ V
V
OSC1
OSC2
* RST
REFH
* IRQ
REFL
V
V
CPU
V
V
DDA
SSA
DD
SS
MONITOR ROM — 310 BYTES
shows the structure of the MC68HC908GR8.
USER RAM — 384 BYTES
M68HC08 CPU
CLOCK GENERATOR MODULE
24 INTR SYSTEM INTEGRATION
8-BIT ANALOG-TO-DIGITAL
PHASE-LOCKED LOOP
SINGLE EXTERNAL IRQ
32-kHz OSCILLATOR
CONVERTER MODULE
ARITHMETIC/LOGIC
MODULE
MODULE
POWER
UNIT (ALU)
MC68HC908GR8 • MC68HC908GR4 Data Sheet, Rev. 7
Figure 1-1. MCU Block Diagram
DUAL V. LOW-VOLTAGE INHIBIT
2-CHANNEL TIMER INTERFACE
1-CHANNEL TIMER INTERFACE
SERIAL COMMUNICATIONS
MASK OPTION REGISTER1
MASK OPTION REGISTER2
COMPUTER OPERATING
SINGLE BRKPT BREAK
INTERRUPT MODULE
INTERFACE MODULE
SERIAL PERIPHERAL
INTERFACE MODULE
PROPERLY MODULE
PROGR. TIMEBASE
MONITOR MODULE
DATA BUS SWITCH
4-BIT KEYBOARD
INTERNAL BUS
MEMORY MAP
MODULE 1
MODULE 2
MODULE
MODULE
MODULE
MODULE
MODULE
MODULE
MODULE
MONITOR MODE ENTRY
MCU Block Diagram
POWER-ON RESET
SECURITY
MODULE
MODULE
MODULE
PTA3/KBD3–
PTA0/KBD0 †
PTB5/AD5–
PTB0/AD0
PTC1–PTC0 † ‡
PTD6/T2CH0 †
PTD5/T1CH1 †
PTD4/T1CH0 †
PTD3/SPSCK †
PTD2/MOSI †
PTD1/MISO †
PTD0/SS †
PTE1/RxD
PTE0/TxD
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