MC68HC908JB8JDW Freescale Semiconductor, MC68HC908JB8JDW Datasheet - Page 133
MC68HC908JB8JDW
Manufacturer Part Number
MC68HC908JB8JDW
Description
IC MCU 8K FLASH 3MHZ 20-SOIC
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908JB8JDWE.pdf
(286 pages)
Specifications of MC68HC908JB8JDW
Core Processor
HC08
Core Size
8-Bit
Speed
3MHz
Connectivity
USB
Peripherals
LVD, POR, PWM
Number Of I /o
13
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
20-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Data Converters
-
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9.7 Hardware Description
9.7.1 Voltage Regulator
9.7.2 USB Transceiver
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
Freescale Semiconductor
The USB module as previously shown in
functional blocks: the low-speed USB transceiver, the USB control logic,
and the USB registers. The following details the function of the regulator,
transceiver, and control logic. See
register settings.
The USB data lines are required by the USB specification to have an
output voltage between 2.8V and 3.6V. The data lines also are required
to have an external 1.5kΩ pull-up resistor connected between a data line
and a voltage source between 3.0V and 3.6V.
worst case electrical connection for the voltage regulator.
The USB transceiver provides the physical interface to the USB D+ and
D– data lines. The transceiver is composed of two parts: an output drive
circuit and a receiver.
TRANSCEIVER
REGULATOR
LOW-SPEED
4.0V – 5.5V
Universal Serial Bus Module (USB)
3.3V
Figure 9-10. Regulator Electrical Connections
D+
D–
R1
USB DATA LINES
R1 = 1.5kΩ ±5%
R2 = 15kΩ ±5%
9.8 I/O Registers
USB CABLE
Figure 9-2
Universal Serial Bus Module (USB)
Figure 9-10
R2
contains three
for details of
Hardware Description
R2
Technical Data
shows the
HOST
HUB
OR
133
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