MC34825EPR2 Freescale Semiconductor, MC34825EPR2 Datasheet - Page 21

• 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

Analog Integrated Circuit Device Data
Freescale Semiconductor
VDDIO voltage. The VDD voltage has to be higher than its
POR threshold for the 34825 to perform the identification
state machine. Once completed, the identification results are
stored in the Status and the ADC Result registers and the
ATTACH bit is set. If the VDDIO is not powered, the interrupt
signal from the INT pin cannot be sent because the INT pin is
normally pulled up to the VDDIO. The host cannot access the
34825 either via the I
occur between the 34825 and the host IC when the VDDIO is
not powered. The INT signal will send an interrupt signal if the
VDDIO is powered and the ATTACH bit is not masked by the
ATTACH_m bit (refer to
SIGNAL SWITCH ARRAY
switching, as shown in
and UART) are for switching the UART and USB signals to
the micro or mini-USB connector. Stereo audio signals can
be switched from the SPK_L and the SPK_R inputs to the DP
and the DM pins that are wired to the USB connector. Both
the SPK_L and the SPK_R inputs are capable of passing
POWER MOSFET
The operation after the identification is dependent on the
The 34825 offers an array of analog switches for signal
The SW8 in
Figure 15
2
C bus. Hence, no communication will
Figure
Interrupt on page 25
is a power MOSFET that controls
15. Two pairs of switches (USB
SPK_R
SPK_L
RXD
TXD
MIC
ISET
D-
D+
OPERATION AFTER IDENTIFICATION
Figure 15. Analog and Digital Switches
for more
SW9
ANALOG SWITCHES
SW1
SW2
SW3
SW4
Drive
Gate
details). If the ATTACH bit is masked while the VDDIO is
powered, the interrupt signal will not be sent but the host IC
can still access the register map via the I
host IC accesses the 34825 register map and determines the
accessory type, it can manage the analog switches and other
signals in the 34825 by programming the S/W Control 1 and
S/W Control 2 registers.
accessory is one of the four test cables listed in
More descriptions on the analog switches and the operation
of the 34825 are given in the following sections.
signals of +/-1.5 V, referencing to the GND pin voltage. The
SPK_L and the SPK_R pins are pulled down to ground via a
100 kΩ resistor respectively, as shown in
microphone switch connects the MIC pin to the VBUS pin.
2 registers except when the accessory attached is a test
cable.
the power flow from the VBUS input to the OUT pin. The
power MOSFET serves two purposes. For the Audio
accessory with microphone, the power MOSFET isolates the
SW5
The switches are open by default except if the attached
All switches are controlled by bits in the S/W Control 1 and
SW6
SW7
SW10
SW8
OUT
VBUS
OPERATION AFTER IDENTIFICATION
DP
DM
FUNCTIONAL DEVICE OPERATION
2
C bus. Once the
Figure
Table
15. A
21.
34825
21