MC68HC08GP32A Datasheet, PDF (84/258 Pages) Freescale Semiconductor, Inc – Microcontrollers

External Interrupt (IRQ)
M68HC08 CPU
CPU
REGISTERS
ARITHMETIC/LOGIC
UNIT (ALU)
CONTROL AND STATUS REGISTERS
64 BYTES
USER ROM
MC68HC08GP32A — 32,256 BYTES
MC68HC08GP16A — 15,872 BYTES
USER RAM
512 BYTES
MONITOR ROM
307 BYTES
USER ROM VECTOR SPACE
36 BYTES
OSC1
OSC2
CLOCK GENERATOR MODULE
32-kHz OSCILLATOR
CGMXFC
PHASE-LOCKED LOOP
RST⁽³⁾
IRQ⁽³⁾
V_DDAD/V_REFH
V_SSAD/V_REFL
SYSTEM INTEGRATION
MODULE
SINGLE EXTERNAL
INTERRUPT MODULE
8-BIT ANALOG-TO-DIGITAL
CONVERTER MODULE
POWER-ON RESET
MODULE
INTERNAL BUS
PROGRAMMABLE TIMEBASE
MODULE
SINGLE BREAKPOINT BREAK
MODULE
DUAL VOLTAGE
LOW-VOLTAGE INHIBIT MODULE
8-BIT KEYBOARD
INTERRUPT MODULE
2-CHANNEL TIMER INTERFACE
MODULE 1
2-CHANNEL TIMER INTERFACE
MODULE 2
SERIAL COMMUNICATIONS
INTERFACE MODULE
COMPUTER OPERATING
PROPERLY MODULE
SERIAL PERIPHERAL
INTERFACE MODULE
MONITOR MODULE
MEMORY MAP
MODULE
MASK OPTION REGISTER 1
MODULE
PTA7/KBD7–
PTA0/KBD0⁽¹⁾
PTB7/AD7
PTB6/AD6
PTB5/AD5
PTB4/AD4
PTB3/AD3
PTB2/AD2
PTB1/AD1
PTB0/AD0
PTC6⁽¹⁾
PTC5⁽¹⁾
PTC4^{(1, 2)}
PTC3^{(1, 2)}
PTC2^{(1, 2)}
PTC1^{(1, 2)}
PTC0^{(1, 2)}
PTD7/T2CH1⁽¹⁾
PTD6/T2CH0⁽¹⁾
PTD5/T1CH1⁽¹⁾
PTD4/T1CH0⁽¹⁾
PTD3/SPSCK⁽¹⁾
PTD2/MOSI⁽¹⁾
PTD1/MISO⁽¹⁾
PTD0/SS⁽¹⁾
PTE1/RxD
PTE0/TxD
SECURITY
MODULE
V_DD
V_SS
V_DDA
V_SSA
POWER
MASK OPTION REGISTER 2
MODULE
1. Ports are software configurable with pullup device if input port.
2. Higher current drive port pins
3. Pin contains integrated pullup device
Figure 7-2. Block Diagram Highlighting IRQ Block and Pins
Interrupt signals on the IRQ pin are latched into the IRQ latch. The interrupt latch remains set until one of
the following actions occurs:
• Vector fetch — A vector fetch automatically generates an interrupt acknowledge signal that clears
the latch that caused the vector fetch.
• Software clear — Software can clear the interrupt latch by writing a 1 to the ACK bit in the interrupt
status and control register (INTSCR).
• Reset — A reset automatically clears the interrupt latch.
MC68HC08GP32A • MC68HC08GP16A Data Sheet, Rev. 1.0
84
Freescale Semiconductor