MC68HC908JL3ECDW Freescale Semiconductor, MC68HC908JL3ECDW Datasheet - Page 123

• Manufacturer Part Number: MC68HC908JL3ECDW
• Description: IC MCU 4K FLASH 8MHZ 28-SOIC
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908JL3ECDW

• 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): 2.7 V ~ 3.3 V
• Data Converters: A/D 12x8b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Connectivity: -

Chapter 13
Computer Operating Properly (COP)
13.1 Introduction
The computer operating properly (COP) module contains a free-running counter that generates a reset if
allowed to overflow. The COP module helps software recover from runaway code. Prevent a COP reset
by clearing the COP counter periodically. The COP module can be disabled through the COPD bit in the
CONFIG1 register.
13.2 Functional Description
Figure 13-1
Freescale Semiconductor
NOTE: See
INTERNAL RESET SOURCES
(COPRS FROM CONFIG1)
Chapter 5 System Integration Module (SIM)
shows the structure of the COP module.
COPD (FROM CONFIG1)
RESET VECTOR FETCH
COPEN (FROM SIM)
COPCTL WRITE
COPCTL WRITE
COP RATE SEL
2OSCOUT
RESET
(1)
MC68HC908JL3E Family Data Sheet, Rev. 4
Figure 13-1. COP Block Diagram
COP MODULE
COP CLOCK
12-BIT SIM COUNTER
COP COUNTER
for more details.
6-BIT COP COUNTER
CLEAR
SIM
RESET STATUS REGISTER
SIM RESET CIRCUIT
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