MC34825EPR2 Freescale Semiconductor, MC34825EPR2 Datasheet - Page 18

• Manufacturer Part Number: MC34825EPR2
• Description: IC USB MINI UNIV CHARGING 20QFN
• Manufacturer: Freescale Semiconductor
• Type: USB Interface ICr

Specifications of MC34825EPR2

• Controller Type: USB Peripheral Controller
• Interface: Micro-USB
• Voltage - Supply: 2.7 V ~ 5.5 V
• Current - Supply: 100mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-UFQFN Exposed Pad
• Usb Version: 2.0
• No. Of Ports: 1
• Supply Voltage Range: 2.7V To 5.5V
• Operating Temperature Range: -40°C To +85°C
• No. Of Pins: 20
• Msl: MSL 3 - 168 Hours
• Peak Reflow Compatible (260 C): Yes
• Rohs Compliant: Yes
• Leaded Process Compatible: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

accessories are accessories that supply power to the VBUS
pin while non-powered accessories do not. When the
accessory is a powered one, the VBUS-detection mechanism
will check the connection between the D+ and the D- pins as
part of the power supply type identification (PSTI). A powered
accessory may or may not have an ID resistor. A non-
powered accessory must have an ID resistor for the
identification purpose.
three types, as listed in
18
34825
FUNCTIONAL DEVICE OPERATION
ACCESSORY IDENTIFICATION
1. Test Accessories. Such accessories include two USB
2. Accessories with a remote controller. Two accessories
Accessories are categorized into two groups. Powered
Accessories that have an ID resistor are grouped into
test cables that are powered accessories, and two
UART test cables that are non-powered accessories. A
test accessory has an ID resistor and four ID resistor
values are reserved for them (see
resistor assignment). The USB or the UART switches
in the IC will be turned on automatically when a test
accessory is attached.
are offered to support remote control (RC) keys. The ID
Table
21.
Table 21
ACCESSORY IDENTIFICATION
for the ID
Standby mode, the 34825 monitors both the ID pin and the
VBUS pin simultaneously. If an accessory is detected, the
identification state machine will find out in parallel the ID
resistor value and the type of the power supply (if a powered
accessory is attached). When the 34825 is in the Active mode
with the ACTIVE bit = 1, the host IC can force the ACTIVE bit
to 0 via the I
detection mechanism and the ID detection mechanism are
described as following.
3. Other accessories. The remaining ID resistor values
The identification flow chart is shown in
The details on the identification flow for the VBUS-
resistor values are 619 kΩ and 1.0 MΩ respectively, as
given in
accessories. The 34825 monitors the ID pin
continuously for key pressing when such an accessory
is connected. 13 ID resistors are assigned to the
remote control keys, as listed in
are reserved for users to assign to their own
accessories.
2
C bus to initiate the identification state machine.
Table
21. Such accessories are non-powered
Analog Integrated Circuit Device Data
Freescale Semiconductor
Table
Figure
21.
14. In the