MC68HC908JB12DW Freescale Semiconductor, MC68HC908JB12DW Datasheet - Page 297

• Manufacturer Part Number: MC68HC908JB12DW
• Description: IC MCU 12K FLASH 6MHZ USB 28SOIC
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908JB12DW

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 6MHz
• Connectivity: SCI, USB
• Peripherals: LED, LVD, POR, PWM
• Number Of I /o: 21
• Program Memory Size: 12KB (12K x 8)
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

17.1 Contents
17.2 Introduction
MC68HC908JB16
Freescale Semiconductor
Technical Data — MC68HC908JB16
Section 17. Computer Operating Properly (COP)
—
Rev. 1.1
17.2
17.3
17.4
17.4.1
17.4.2
17.4.3
17.4.4
17.4.5
17.4.6
17.4.7
17.4.8
17.5
17.6
17.7
17.8
17.8.1
17.8.2
17.9
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 CONFIG register.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297
Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .301
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .298
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299
COP Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301
Monitor Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .301
COP Module During Break Mode . . . . . . . . . . . . . . . . . . . . . . 302
Computer Operating Properly (COP)
OSCDCLK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .299
STOP Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299
COPCTL Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .299
Power-On Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299
Internal Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
Reset Vector Fetch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
COPD (COP Disable). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
COPRS (COP Rate Select) . . . . . . . . . . . . . . . . . . . . . . . . 300
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .302
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .302
Technical Data
297