MC68HC705J1ACDW Freescale Semiconductor, MC68HC705J1ACDW Datasheet - Page 72
MC68HC705J1ACDW
Manufacturer Part Number
MC68HC705J1ACDW
Description
IC MCU 4MHZ 1.2K OTP 20-SOIC
Manufacturer
Freescale Semiconductor
Series
HC05r
Datasheet
1.MCHRC705J1ACDWE.pdf
(162 pages)
Specifications of MC68HC705J1ACDW
Core Processor
HC05
Core Size
8-Bit
Speed
4MHz
Peripherals
POR, WDT
Number Of I /o
14
Program Memory Size
1.2KB (1.2K x 8)
Program Memory Type
OTP
Ram Size
64 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
20-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Data Converters
-
Connectivity
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MC68HC705J1ACDW
Manufacturer:
MOTOROLA/摩托罗拉
Quantity:
20 000
Company:
Part Number:
MC68HC705J1ACDWE
Manufacturer:
INTERSIL
Quantity:
1 000
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Resets and Interrupts
4.3.2 External Reset
4.3.3 COP Watchdog Reset
4.3.4 Illegal Address Reset
Technical Data
A logic 0 applied to the RESET pin for 1 1/2 t
reset. A Schmitt trigger senses the logic level at the RESET pin.
A timeout of the COP watchdog generates a COP reset. The COP
watchdog is part of a software error detection system and must be
cleared periodically to start a new timeout period. To clear the COP
watchdog and prevent a COP reset, write a logic 0 to bit 0 (COPC) of the
COP register at location $07F0.
An opcode fetch from an address not in random-access memory (RAM)
or erasable, programmable read-only memory (EPROM) generates a
reset.
Notes:
ADDRESS BUS
RESET pulse width
2. The next rising edge of the internal clock after the rising edge of RESET initiates the reset sequence.
1. Internal clock, internal address bus, and internal data bus are not available externally.
Freescale Semiconductor, Inc.
INTERNAL
INTERNAL
INTERNAL
DATA BUS
For More Information On This Product,
CLOCK
RESET
Go to: www.freescale.com
Characteristic
Resets and Interrupts
Figure 4-3. External Reset Timing
Table 4-1. External Reset Timing
$07FE
t
RL
$07FE
$07FE
Symbol
$07FE
t
RL
NEW
PCH
cyc
$07FF
MC68HC705J1A — Rev. 4.0
generates an external
NEW
PCL
Min
1.5
NEW PC
DUMMY
Max
—
NEW PC
CODE
OP
Unit
t
cyc
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