MC908AP32CFBE Freescale, MC908AP32CFBE Datasheet - Page 294
MC908AP32CFBE
Manufacturer Part Number
MC908AP32CFBE
Description
Manufacturer
Freescale
Datasheet
1.MC908AP32CFBE.pdf
(324 pages)
Specifications of MC908AP32CFBE
Cpu Family
HC08
Device Core Size
8b
Frequency (max)
8MHz
Interface Type
SCI/SPI
Total Internal Ram Size
2KB
# I/os (max)
32
Number Of Timers - General Purpose
4
Operating Supply Voltage (typ)
3.3/5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
2.7V
On-chip Adc
8-chx10-bit
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
44
Package Type
PQFP
Program Memory Type
Flash
Program Memory Size
32KB
Lead Free Status / RoHS Status
Compliant
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Break Module (BRK)
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.
21.3.1 Flag Protection During Break Interrupts
The BCFE bit in the SIM break flag control register (SBFCR) enables software to clear status bits during
the break state.
21.3.2 CPU During Break Interrupts
The CPU starts a break interrupt by:
The break interrupt begins after completion of the CPU instruction in progress. If the break address
register match occurs on the last cycle of a CPU instruction, the break interrupt begins immediately.
21.3.3 TIMI and TIM2 During Break Interrupts
A break interrupt stops the timer counters.
21.3.4 COP During Break Interrupts
The COP is disabled during a break interrupt when V
21.4 Low-Power Modes
The WAIT and STOP instructions put the MCU in low power-consumption standby modes.
292
•
•
•
•
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.
Loading the instruction register with the SWI instruction
Loading the program counter with $FFFC and $FFFD
($FEFC and $FEFD in monitor mode)
IAB15–IAB0
Figure 21-2. Break Module Block Diagram
IAB15–IAB8
IAB7–IAB0
MC68HC908AP Family Data Sheet, Rev. 4
BREAK ADDRESS REGISTER HIGH
BREAK ADDRESS REGISTER LOW
8-BIT COMPARATOR
8-BIT COMPARATOR
TST
is present on the RST pin.
CONTROL
Figure 21-2
BREAK
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