MC68HC908GR8CFA Freescale Semiconductor, MC68HC908GR8CFA Datasheet - Page 134

• Manufacturer Part Number: MC68HC908GR8CFA
• Description: IC MCU FLSH 8BIT8MHZ 7.5K32-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908GR8CFA

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 21
• 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: 32-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Computer Operating Properly (COP)
Technical Data
134
INTERNAL RESET SOURCES
RESET VECTOR FETCH
COPEN (FROM SIM)
STOP INSTRUCTION
NOTE:
(FROM CONFIG)
COP RATE SEL
(FROM CONFIG)
COPCTL WRITE
COPCTL WRITE
COP DISABLE
CGMXCLK
RESET
The COP counter is a free-running 6-bit counter preceded by a 12-bit
prescaler counter. If not cleared by software, the COP counter overflows
and generates an asynchronous reset after 2
CGMXCLK cycles, depending on the state of the COP rate select bit,
COPRS, in the configuration register. With a 2
overflow option, a 32.768-kHz crystal gives a COP timeout period of
250 ms. Writing any value to location $FFFF before an overflow occurs
prevents a COP reset by clearing the COP counter and stages 12
through 5 of the prescaler.
Service the COP immediately after reset and before entering or after
exiting stop mode to guarantee the maximum time before the first COP
counter overflow.
A COP reset pulls the RST pin low for 32 CGMXCLK cycles and sets the
COP bit in the reset status register (RSR).
Freescale Semiconductor, Inc.
For More Information On This Product,
COP MODULE
Figure 9-1. COP Block Diagram
COP CLOCK
12-BIT COP PRESCALER
Computer Operating Properly (COP)
Go to: www.freescale.com
COP COUNTER
6-BIT COP COUNTER
CLEAR
RESET STATUS REGISTER
18
13
MC68HC908GR8 — Rev 4.0
RESET CIRCUIT
– 2
– 2
4
4
or 2
CGMXCLK cycle
13
– 2
MOTOROLA
4