MC908JL3EMPE Freescale Semiconductor, MC908JL3EMPE Datasheet - Page 129
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MC908JL3EMPE
Manufacturer Part Number
MC908JL3EMPE
Description
IC MCU 4K FLASH W/OSC 28-PDIP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908JK1ECDWE.pdf
(180 pages)
Specifications of MC908JL3EMPE
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Peripherals
LED, LVD, POR, PWM
Number Of I /o
23
Program Memory Size
4KB (4K x 8)
Program Memory Type
FLASH
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 12x8b
Oscillator Type
External
Operating Temperature
-40°C ~ 125°C
Package / Case
28-DIP (0.600", 15.24mm)
Processor Series
HC08JL
Core
HC08
Data Bus Width
8 bit
Data Ram Size
128 B
Maximum Clock Frequency
8 MHz
Number Of Programmable I/os
23
Number Of Timers
2
Maximum Operating Temperature
+ 125 C
Mounting Style
Through Hole
Development Tools By Supplier
FSICEBASE, DEMO908JL16E, M68CBL05CE
Minimum Operating Temperature
- 40 C
On-chip Adc
8 bit, 12 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Connectivity
-
Lead Free Status / Rohs Status
Details
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Chapter 15
Break Module (BREAK)
15.1 Introduction
This section describes the break module. The break module can generate a break interrupt that stops
normal program flow at a defined address to enter a background program.
15.2 Features
Features of the break module include the following:
15.3 Functional Description
When the internal address bus matches the value written in the break address registers, the break module
issues a breakpoint signal (BKPT) to the SIM. The SIM then causes the CPU to load 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 the break Interrupt
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 one to the BRKA bit in the break status and control register.
IAB[15:0]
Figure 15-1. Break Module Block Diagram
MC68HC908JL3E Family Data Sheet, Rev. 4
BREAK ADDRESS REGISTER HIGH
BREAK ADDRESS REGISTER LOW
8-BIT COMPARATOR
8-BIT COMPARATOR
IAB[7:0]
IAB[15:8]
CONTROL
Figure 15-1
BKPT
(TO SIM)
shows the
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