MC908JB8ADWE Freescale Semiconductor, MC908JB8ADWE Datasheet - Page 34

IC MCU 3MHZ 8K FLASH 28-SOIC

MC908JB8ADWE

Manufacturer Part Number
MC908JB8ADWE
Description
IC MCU 3MHZ 8K FLASH 28-SOIC
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet

Specifications of MC908JB8ADWE

Core Processor
HC08
Core Size
8-Bit
Speed
3MHz
Connectivity
USB
Peripherals
LVD, POR, PWM
Number Of I /o
21
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
28-SOIC (7.5mm Width)
Processor Series
HC08JB
Core
HC08
Data Bus Width
8 bit
Data Ram Size
256 B
Interface Type
USB
Maximum Clock Frequency
3 MHz
Number Of Programmable I/os
37
Number Of Timers
2
Operating Supply Voltage
5.25 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
256Byte
Cpu Speed
8MHz
No. Of Timers
1
Embedded Interface Type
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

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General Description
1.5.1 Power Supply Pins (V
1.5.2 Voltage Regulator Out (V
Technical Data
34
V
from a single power supply.
Fast signal transitions on MCU pins place high, short-duration current
demands on the power supply. To prevent noise problems, take special
care to provide power supply bypassing at the MCU as
shows. Place the bypass capacitors as close to the MCU power pins as
possible. Use high-frequency-response ceramic capacitors for C
C
that require the port pins to source high current levels.
V
internally for the MCU operation and the USB data driver. It is also used
to supply the voltage for the external pullup resistor required on the
USB’s D– line. The V
or larger and a 0.1 µF ceramic bypass capacitor as
Place the bypass capacitors as close to the V
DD
REG
BULK
and V
DD
are optional bulk current bypass capacitors for use in applications
is the 3.3 V output of the on-chip voltage regulator. V
, V
REG
SS
SS
)
are the power supply and ground pins. The MCU operates
)
General Description
Figure 1-5. Power Supply Bypassing
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
NOTE: Values shown are typical values.
REG
V
pin requires an external bulk capacitor 4.7µF
V
DD
DD
MCU
C
0.1 µF
C
+
BYPASS
BULK
V
SS
REG
Freescale Semiconductor
pin as possible.
Figure 1-6
Figure 1-5
REG
shows.
is used
BYPASS
.

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