MC908JB16DWE Freescale Semiconductor, MC908JB16DWE Datasheet - Page 286
MC908JB16DWE
Manufacturer Part Number
MC908JB16DWE
Description
IC MCU 16K FLASH 6MHZ USB 28SOIC
Manufacturer
Freescale Semiconductor
Series
HC08r
Specifications of MC908JB16DWE
Core Processor
HC08
Core Size
8-Bit
Speed
6MHz
Connectivity
SCI, USB
Peripherals
LED, LVD, POR, PWM
Number Of I /o
21
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
384 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
28-SOIC (7.5mm Width)
Processor Series
HC08JB
Core
HC08
Data Bus Width
8 bit
Data Ram Size
384 B
Interface Type
I2C/SCI/SPI/USB
Maximum Clock Frequency
12 MHz
Number Of Programmable I/os
21
Number Of Timers
4
Operating Supply Voltage
5.5 V
Maximum Operating Temperature
+ 70 C
Mounting Style
SMD/SMT
Development Tools By Supplier
FSICEBASE, DEMO908GZ60E, M68EML08GZE, KITUSBSPIDGLEVME, KITUSBSPIEVME, KIT33810EKEVME
Minimum Operating Temperature
0 C
Controller Family/series
HC08
No. Of I/o's
21
Ram Memory Size
384Byte
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
-
Data Converters
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
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Manufacturer
Quantity
Price
Company:
Part Number:
MC908JB16DWE
Manufacturer:
FREESCALE
Quantity:
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Part Number:
MC908JB16DWE
Manufacturer:
FRE/MOT
Quantity:
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External Interrupt (IRQ)
15.8 IRQ Status and Control Register
Technical Data
286
Address:
The IRQ status and control register (ISCR) controls and monitors
operation of the IRQ module. The ISCR has the following functions:
IRQF — IRQ Flag
ACK — IRQ Interrupt Request Acknowledge Bit
IMASK — IRQ Interrupt Mask Bit
MODE — IRQ Edge/Level Select Bit
Reset:
Read:
Write:
•
•
•
•
This read-only status bit is high when the IRQ interrupt is pending.
Writing a logic 1 to this write-only bit clears the IRQ latch. ACK always
reads as logic 0. Reset clears ACK.
Writing a logic 1 to this read/write bit disables IRQ interrupt requests.
Reset clears IMASK.
This read/write bit controls the triggering sensitivity of the IRQ pin.
Reset clears MODE.
1 = IRQ interrupt pending
0 = IRQ interrupt not pending
1 = IRQ interrupt requests disabled
0 = IRQ interrupt requests enabled
1 = IRQ pin interrupt requests on falling edges and low levels
0 = IRQ pin interrupt requests on falling edges only
Shows the state of the IRQ flag
Clears the IRQ latch
Masks IRQ interrupt request
Controls triggering sensitivity of the IRQ pin.
Figure 15-3. IRQ Status and Control Register (ISCR)
$001E
Bit 7
0
0
External Interrupt (IRQ)
= Unimplemented
6
0
0
5
0
0
4
0
0
IRQF
3
0
MC68HC908JB16
ACK
Freescale Semiconductor
2
0
0
IMASK
1
0
—
Rev. 1.1
MODE
Bit 0
0
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