mc68hc908gp32 Freescale Semiconductor, Inc, mc68hc908gp32 Datasheet - Page 23

• Manufacturer Part Number: mc68hc908gp32
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

1.3 MCU Block Diagram
Figure 1-1
indicates the module name. Text in parentheses next to a signal indicates the module which uses the
signal.
Freescale Semiconductor
† Ports are software configurable with pullup device if input port.
‡ Higher current drive port pins
* Pin contains integrated pullup device
V
V
DDAD
CONTROL AND STATUS REGISTERS — 64 BYTES
SSAD
CGMXFC
USER FLASH VECTOR SPACE — 36 BYTES
REGISTERS
/V
/V
OSC1
OSC2
* RST
* IRQ
V
V
REFH
REFL
V
V
DDA
SSA
CPU
DD
SS
USER FLASH — 32,256 BYTES
MONITOR ROM — 307 BYTES
shows the structure of the MC68HC908GP32. Text in parentheses within a module block
USER RAM — 512 BYTES
CLOCK GENERATOR MODULE
24 INTR SYSTEM INTEGRATION
M68HC08 CPU
8-BIT ANALOG-TO-DIGITAL
PHASE-LOCKED LOOP
SINGLE EXTERNAL IRQ
32-kHz OSCILLATOR
CONVERTER MODULE
POWER-ON RESET
ARITHMETIC/LOGIC
MODULE
MODULE
MODULE
POWER
UNIT (ALU)
Figure 1-1. MCU Block Diagram
MC68HC908GP32 Data Sheet, Rev. 10
LOW-VOLTAGE INHIBIT MODULE
2-CHANNEL TIMER INTERFACE
2-CHANNEL TIMER INTERFACE
CONFIGURATION REGISTER 2
CONFIGURATION REGISTER 1
SINGLE BREAKPOINT BREAK
PROGRAMMABLE TIMEBASE
SERIAL COMMUNICATIONS
COMPUTER OPERATING
INTERRUPT MODULE
INTERFACE MODULE
SERIAL PERIPHERAL
INTERFACE MODULE
PROPERLY MODULE
MONITOR MODULE
DATA BUS SWITCH
8-BIT KEYBOARD
DUAL VOLTAGE
INTERNAL BUS
MEMORY MAP
MODULE 1
MODULE 2
MODULE
MODULE
MODULE
MODULE
MODULE
MODULE
MONITOR MODE ENTRY
MCU Block Diagram
SECURITY
MODULE
MODULE
PTA7/KBD7–
PTA0/KBD0 †
PTB7/AD7
PTB6/AD6
PTB5/AD5
PTB4/AD4
PTB3/AD3
PTB2/AD2
PTB1/AD1
PTB0/AD0
PTC6 †
PTC5 †
PTC4 † ‡
PTC3 † ‡
PTC2 † ‡
PTC1 † ‡
PTC0 † ‡
PTD7/T2CH1 †
PTD6/T2CH0 †
PTD5/T1CH1 †
PTD4/T1CH0 †
PTD3/SPSCK †
PTD2/MOSI †
PTD1/MISO †
PTD0/SS †
PTE1/RxD
PTE0/TxD
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