MC68HC908LK24CFU Freescale Semiconductor, MC68HC908LK24CFU Datasheet - Page 146
MC68HC908LK24CFU
Manufacturer Part Number
MC68HC908LK24CFU
Description
IC MCU 24K FLASH 8MHZ SPI 64-QFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908LK24CFUE.pdf
(464 pages)
Specifications of MC68HC908LK24CFU
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
I²C, IRSCI, SPI
Peripherals
LCD, LVD, POR, PWM
Number Of I /o
40
Program Memory Size
24KB (24K x 8)
Program Memory Type
FLASH
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 6x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Available stocks
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Manufacturer
Quantity
Price
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Part Number:
MC68HC908LK24CFU
Manufacturer:
FREESCALE Semiconductor
Quantity:
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Part Number:
MC68HC908LK24CFU
Manufacturer:
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Quantity:
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System Integration Module (SIM)
9.4.2.1 Power-On Reset
Data Sheet
146
The COP reset is asynchronous to the bus clock.
The active reset feature allows the part to issue a reset to peripherals
and other chips within a system built around the MCU.
When power is first applied to the MCU, the power-on reset module
(POR) generates a pulse to indicate that power-on has occurred. The
external reset pin (RST) is held low while the SIM counter counts out
4096 + 32 ICLK cycles. Thirty-two ICLK cycles later, the CPU and
memories are released from reset to allow the reset vector sequence to
occur.
At power-on, these events occur:
•
•
•
•
•
•
IRST
ICLK
RST
IAB
A POR pulse is generated.
The internal reset signal is asserted.
The SIM enables CGMOUT.
Internal clocks to the CPU and modules are held inactive for 4096
ICLK cycles to allow stabilization of the oscillator.
The RST pin is driven low during the oscillator stabilization time.
The POR bit of the SIM reset status register (SRSR) is set and all
other bits in the register are cleared.
System Integration Module (SIM)
ILLEGAL ADDRESS RST
Figure 9-6. Sources of Internal Reset
ILLEGAL OPCODE RST
RST PULLED LOW BY MCU
Figure 9-5. Internal Reset Timing
COPRST
32 CYCLES
POR
LVI
MC68HC908LJ24/LK24 — Rev. 2.1
INTERNAL RESET
32 CYCLES
Freescale Semiconductor
VECTOR HIGH
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