MC68HC908GR8CDW Freescale Semiconductor, MC68HC908GR8CDW Datasheet - Page 135

• Manufacturer Part Number: MC68HC908GR8CDW
• Description: IC MCU 8K FLASH 8MHZ 28-SOIC
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908GR8CDW

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 17
• Program Memory Size: 7.5KB (7.5K x 8)
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 6x8b
• Oscillator Type: Internal
• 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: -

9.4 I/O Signals
9.4.1 CGMXCLK
9.4.2 STOP Instruction
9.4.3 COPCTL Write
9.4.4 Power-On Reset
9.4.5 Internal Reset
MC68HC908GR8 — Rev 4.0
MOTOROLA
NOTE:
In monitor mode, the COP is disabled if the RST pin or the IRQ1 is held
at V
Place COP clearing instructions in the main program and not in an
interrupt subroutine. Such an interrupt subroutine could keep the COP
from generating a reset even while the main program is not working
properly.
The following paragraphs describe the signals shown in
CGMXCLK is the crystal oscillator output signal. CGMXCLK frequency
is equal to the crystal frequency.
The STOP instruction clears the COP prescaler.
Writing any value to the COP control register (COPCTL) (see
Control
the prescaler. Reading the COP control register returns the low byte of
the reset vector.
The power-on reset (POR) circuit clears the COP prescaler 4096
CGMXCLK cycles after power-up.
An internal reset clears the COP prescaler and the COP counter.
Freescale Semiconductor, Inc.
TST
For More Information On This Product,
. During the break state, V
Register) clears the COP counter and clears bits 12 through 5 of
Computer Operating Properly (COP)
Go to: www.freescale.com
TST
on the RST pin disables the COP.
Computer Operating Properly (COP)
Figure
Technical Data
COP
I/O Signals
9-1.
135