MC908AZ32ACFU Freescale Semiconductor, MC908AZ32ACFU Datasheet - Page 113
MC908AZ32ACFU
Manufacturer Part Number
MC908AZ32ACFU
Description
IC MCU 32K FLASH 8.4MHZ 64-QFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908AZ32ACFUE.pdf
(324 pages)
Specifications of MC908AZ32ACFU
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
CAN, SCI, SPI
Peripherals
LVD, POR, PWM
Number Of I /o
40
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 15x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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Chapter 11
Brake Module
11.1 Introduction
The break module can generate a break interrupt that stops normal program flow at a defined address to
enter a background program.
11.2 Features
11.3 Functional Description
When the internal address bus matches the value written in the break address registers, the break module
issues a breakpoint signal to the CPU. The CPU then loads the instruction register with a software
interrupt instruction (SWI) after completion of the current CPU instruction. The program counter vectors
to $FFFC and $FFFD ($FEFC and $FEFD in monitor mode).
The following events can cause a break interrupt to occur:
When a CPU-generated address matches the contents of the break address registers, the break interrupt
begins after the CPU completes its current instruction. A return-from-interrupt instruction (RTI) in the
break routine ends the break interrupt and returns the MCU to normal operation.
structure of the break module.
Freescale Semiconductor
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Accessible I/O Registers during Break Interrupts
CPU-Generated Break Interrupts
Software-Generated Break Interrupts
COP Disabling during Break Interrupts
A CPU-generated address (the address in the program counter) matches the contents of the break
address registers.
Software writes a logic 1 to the BRKA bit in the break status and control register.
IAB[15:0]
Figure 11-1. Break Module Block Diagram
IAB[15:8]
IAB[7:0]
BREAK ADDRESS REGISTER HIGH
MC68HC908AZ32A Data Sheet, Rev. 2
BREAK ADDRESS REGISTER LOW
8-BIT COMPARATOR
8-BIT COMPARATOR
CONTROL
BREAK
Figure 11-1
shows the
113
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