MC908LJ24CPBE Freescale Semiconductor, MC908LJ24CPBE Datasheet - Page 404

IC MCU 24K FLASH 8MHZ SPI 64LQFP

MC908LJ24CPBE

Manufacturer Part Number
MC908LJ24CPBE
Description
IC MCU 24K FLASH 8MHZ SPI 64LQFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet

Specifications of MC908LJ24CPBE

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-LQFP
Processor Series
HC08LJ
Core
HC08
Data Bus Width
8 bit
Data Ram Size
768 B
Interface Type
SCI/SPI
Maximum Clock Frequency
8 MHz
Number Of Programmable I/os
48
Number Of Timers
4
Operating Supply Voltage
3.3 V, 5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Development Tools By Supplier
FSICEBASE, M68EML08LJLKE, ZK-HC08LX-A, M68CBL05CE
Minimum Operating Temperature
- 40 C
On-chip Adc
6-ch x 10-bit
Controller Family/series
HC08
No. Of I/o's
40
Ram Memory Size
768Byte
Cpu Speed
8MHz
No. Of Timers
2
Embedded Interface Type
I2C, SCI, SPI
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant

Available stocks

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Part Number
Manufacturer
Quantity
Price
Part Number:
MC908LJ24CPBE
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Part Number:
MC908LJ24CPBER
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
External Interrupt (IRQ)
19.4.1 IRQ Pin
Data Sheet
404
NOTE:
A logic 0 on the IRQ pin can latch an interrupt request into the IRQ latch.
A vector fetch, software clear, or reset clears the IRQ latch.
If the MODE bit is set, the IRQ pin is both falling-edge-sensitive and low-
level-sensitive. With MODE set, both of the following actions must occur
to clear IRQ:
The vector fetch or software clear and the return of the IRQ pin to logic 1
may occur in any order. The interrupt request remains pending as long
as the IRQ pin is at logic 0. A reset will clear the latch and the MODE
control bit, thereby clearing the interrupt even if the pin stays low.
If the MODE bit is clear, the IRQ pin is falling-edge-sensitive only. With
MODE clear, a vector fetch or software clear immediately clears the IRQ
latch.
The IRQF bit in the INTSCR register can be used to check for pending
interrupts. The IRQF bit is not affected by the IMASK bit, which makes it
useful in applications where polling is preferred.
Use the BIH of BIL instruction to read the logic level on the IRQ pin.
When using the level-sensitive interrupt trigger, avoid false interrupts by
masking interrupt requests in the interrupt routine.
Vector fetch or software clear — A vector fetch generates an
interrupt acknowledge signal to clear the latch. Software may
generate the interrupt acknowledge signal by writing a logic 1 to
the ACK bit in the interrupt status and control register (INTSCR).
The ACK bit is useful in applications that poll the IRQ pin and
require software to clear the IRQ latch. Writing to the ACK bit prior
to leaving an interrupt service routine can also prevent spurious
interrupts due to noise. Setting ACK does not affect subsequent
transitions on the IRQ pin. A falling edge that occurs after writing
to the ACK bit latches another interrupt request. If the IRQ mask
bit, IMASK, is clear, the CPU loads the program counter with the
vector address at locations $FFFA and $FFFB.
Return of the IRQ pin to logic 1 — As long as the IRQ pin is at
logic 0, IRQ remains active.
External Interrupt (IRQ)
MC68HC908LJ24/LK24 — Rev. 2.1
Freescale Semiconductor

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