MC34825EPR2 Freescale Semiconductor, MC34825EPR2 Datasheet - Page 26

• 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

the corresponding bit in the Interrupt register. As long as the
Interrupt register is set, the INT pin outputs low voltage. The
Interrupt register is not writable. When the Interrupt register is
read, the Interrupt register is cleared automatically. Once the
Interrupt register is cleared, the INT pin returns to high
voltage.
The INT pin is related to the interrupt sources as described in
the Interrupt section. The ISET pin is controlled by the
register bit with the same name in the Control register.
and the Active modes. The serial clock (SCL) and the serial
data (SDA) lines must be connected to a positive supply
using pull-up resistors. Internally the I
referenced to the VDDIO input. The 34825 is a slave device.
Maximum data rate is 400 kbps.
ADDRESSING AND PROTOCOL
Figure
26
34825
FUNCTIONAL DEVICE OPERATION
I2C SERIAL BUS INTERFACE
There are two open-drain logic output pins, INT and ISET.
The I
The 7-bit address for the 34825 is 0100101, as shown in
22.
2
C bus is enabled in the Standby, the Power Save,
Figure 23. Master Transmits to Slave (Write Mode)
2
C bus voltage is
I
2
C SERIAL BUS INTERFACE
LOGIC OUTPUT
interrupt source. When the bit of the Interrupt Mask register
is set to 1, the corresponding interrupt source is blocked. The
INT does not output low voltage even though this interrupt bit
is set in the Interrupt register.
level. A typical charger IC uses one external resistor to set
the charge current. By using ISET output, the charger IC can
use two external resistors in parallel to set two charge current
levels, as shown in
protocols. The Word Address is an 8-bit register address in
the 34825.
An interrupt mask register is provided to mask unwanted
The ISET generally is used to control the charge current
The following three figures show three I
0
1
Figure 22. I
0
Figure
Analog Integrated Circuit Device Data
0
27.
2
C Slave Address
1
Freescale Semiconductor
0
2
C-bus transaction
1
R/W