MC68HC908JB8JP Freescale Semiconductor, MC68HC908JB8JP Datasheet - Page 241
MC68HC908JB8JP
Manufacturer Part Number
MC68HC908JB8JP
Description
IC MCU FLASH 8BIT 8K 20-DIP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908JB8JDWE.pdf
(286 pages)
Specifications of MC68HC908JB8JP
Core Processor
HC08
Core Size
8-Bit
Speed
3MHz
Connectivity
USB
Peripherals
LVD, POR, PWM
Number Of I /o
13
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
20-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Data Converters
-
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15.5 COP Control Register
15.6 Interrupts
15.7 Monitor Mode
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
Freescale Semiconductor
Address:
Reset:
COPRS — COP Rate Select Bit
COPD — COP Disable Bit
The COP control register is located at address $FFFF and overlaps the
reset vector. Writing any value to $FFFF clears the COP counter and
starts a new timeout period. Reading location $FFFF returns the low
byte of the reset vector.
The COP does not generate CPU interrupt requests.
The COP is disabled in monitor mode when V
IRQ pin or on the RST pin.
Read:
Write:
COPRS selects the COP timeout period. Reset clears COPRS.
COPD disables the COP module.
1 = COP timeout period is (2
0 = COP timeout period is (2
1 = COP module disabled
0 = COP module enabled
$FFFF
Bit 7
Computer Operating Properly (COP)
Figure 15-3. COP Control Register (COPCTL)
6
5
Low byte of reset vector
Clear COP counter
Unaffected by reset
4
13
18
– 2
– 2
4
4
Computer Operating Properly (COP)
) × OSCXOUT cycles
) × OSCXOUT cycles
3
DD
+ V
2
HI
COP Control Register
is present on the
1
Technical Data
Bit 0
241
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