Freescale Semiconductor
Technical Data
Document Number: MC34827
Rev. 3.0, 6/2014
Mini or Micro-USB Interface IC
The 34827 is a dedicated IC for managing charging and signal
multiplexing between a cell phone and its accessory via a 5-pin Mini or
Micro-USB connector. An external power source, such as a dedicated
AC/DC adapter or a standard USB port, is able to charge the battery in
the cell phone via the connector. The 34827 is capable of identifying
the type of the external power source and selecting one of two battery
charge current levels according to the type. The internal power switch
can protect the phone system against 28 V power supply input. The
34827 is also able to multiplex the 5 pins to support UART and High-
Speed USB 2.0 data communication, mono/stereo-audio/microphone
headset with or without a cord remote control, manufacturing or R/D
test cables and other accessories.
To identify what accessory is plugged into the Mini or Micro-USB
connector, the 34827 supports various detection mechanisms,
including the VBUS detection and ID detection. A high accurate 5-bit
ADC is offered to distinguish the 32 levels of ID resistance and to
identify the button pressed in a cord remote control while an Audio
Type 1 cable is attached. After identifying the accessory attached, the
34827 configures itself to support the accessory and interrupts a host
via an I
2
C serial bus for further actions. The 34827 is also able to
identify some non-supported accessory, such as video cable, Phone-
Powered Devices and USB OTG devices. The host controls the 34827
via the I
2
C serial bus. This device is powered using SMARTMOS
technology.
Features
• Automatically identifies the power supply type and sets one of two
battery-charge-current levels
• Internal power switch protects the phone system against 28 V power
supply input
• Supports stereo/mono headset with or without micro phone and
remote control
• Supports USB or UART test and R/D cables
• High speed USB2.0 compliant
• Supports 32 ID resistance values with a high-accuracy 5-bit ADC
• I
2
C interface with interrupt to the host
• 10
μA
quiescent current in Standby mode
34827
BASEBAND
GPIO
I
2
C
UART
USB XCVR
Test Port
Audio
VDDIO
INTB
I2C_SDA
I2C_SCL
RXD
TXD
D+
D-
JIG
BOOT
SPK_L
SPK_R
MIC
ISET
OUT
VBUS
ID
DP
DM
GND
VDD
34827
INTERFACE IC
(PB-FREE)
98ASA00050D
20-PIN UTQFN-EP
(PB-FREE)
98ASA00037D
20-PIN UTQFN-EP
Applications
• Cell phones
• MP3/MP4 players
• Portable voice recorders
• USB universal charging solution (UCS-OMTP)
• Supports mini/micro - USB connector
• UART and USB high speed communication
• Remote control/accessories IDs
Charger
Li+
V
BUS
ID
D+
D-
GND
USB CONNECTOR
Figure 1. MC34827 Simplified Application Diagram
© Freescale Semiconductor, Inc., 2011 - 2014. All rights reserved.
1
Orderable Parts
Table 1. Orderable Part Variations
Part Number
(1)
MC34827A2EP
MC34827A1EP
Temperature (T
A
)
-40 to 85 °C
Package
3.0 mm X 4.0 mm UTQFN-EP
3.0 mm X 3.0 mm UTQFN-EP
Notes
1. To order parts in Tape and Reel, add the R2 suffix to the part number.
MC34827
2
Analog Integrated Circuit Device Data
Freescale Semiconductor
INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
VDDIO
I
2
C_SDA
I
2
C_SCL
Reset
OSC
VBUS
Detect
Internal
Supplies
VDD
VBUS
I
Interface
2
C
Gate
Drive and
OCP
Register
and
State
Machine
OUT
INTB
Interrupt
JIG
BOOT
JIG
Logic
Output
ISET
RxD
TxD
UART
Switches
DP
DM
ID
D+
D-
SPK_R
SPK_L
MIC
USB
Switches
ID ADC
Audio
Switches
VBUS
ID
Detect
GND
Figure 2. MC34827 Simplified Internal Block Diagram
MC34827
Analog Integrated Circuit Device Data
Freescale Semiconductor
3
PIN CONNECTIONS
PIN CONNECTIONS
VBUS
VBUS
17
DM
SPK_R
SPK_L
MIC
D+
D-
RxD
1
2
3
4
5
6
10
7
8
9
21
16
15
14
13
12
11
ISET
OUT
I2C_SCL
I2C_SDA
INTB
VDD
ISET
16
ID
DP
ID
20
DM
18
DP
19
(A). Pinout of 34827 Using a 3.0 mm X 4.0 mm 20 Pin. UTQFN Package
(Transparent Top View)
Table 2. MC34827 Pin Definitions
A functional description of each pin can be found in the Functional Pin Description section beginning on
page 14.
Pin Number
1
2
3
4
5
6
7
8
9
Pin Name
SPK_R
SPK_L
MIC
D+
D-
RxD
TxD
BOOT
VDDIO
Pin Function
Input
Input
Output
IO
IO
Output
Input
Output
Input
Formal Name
Speaker right channel
Speaker left channel
Microphone output
D+ of the USB
transceiver
D- of the USB
transceiver
UART receiver
UART transmitter
BOOT indicator
IO power supply
Definition
Right channel input of the speaker signals
Left channel input of the speaker signals
Microphone output to the baseband of the cell phone system
D+ line of the USB transceiver
D- line of the USB transceiver
Receive line of the UART
Transmit line of the UART
Push-pull output to indicate the boot switch setting of the jig cable
IO supply voltage. This is the internal supply voltage for the BOOT and
INTB outputs. It can supply the external pull-up voltages for the JIG pin
and the I
2
C bus outside the 34827. This pin also functions as the
hardware reset to the IC.
Open-drain output to indicate the insertion of a jig cable
Supply input
Push-pull interrupt output
Data line of the I
2
C interface
Clock line of the I
2
C interface
The output of the power MOSFET pass switch
Open-drain output to set the charger current
Mini-USB VBUS line
20
19
GND
18
17
SPK_R
SPK_L
MIC
D+
D-
1
2
3
4
5
10
6
7
8
9
21
15
14
13
12
11
OUT
I2C_SCL
I2C_SDA
INTB
VDD
GND
TxD
BOOT
VDDIO
JIG
RxD
TxD
BOOT
VDDIO
JIG
(B). Pinout of 34827 Using a 3.0 mm X 3.0 mm 20 Pin. UTQFN Package
(Transparent Top View)
Figure 3. MC34827 Pin Connections
10
11
12
13
14
15
16
17
JIG
VDD
INTB
I2C_SDA
I2C_SCL
OUT
ISET
VBUS
Output
Input
Output
IO
Input
Output
Output
Input
JIG indicator
Power supply
Interrupt output
I
2
C Data
I
2
C Clock
Power output
Charge current setting
VBUS power supply
MC34827
4
Analog Integrated Circuit Device Data
Freescale Semiconductor
PIN CONNECTIONS
Table 2. MC34827 Pin Definitions (continued)
A functional description of each pin can be found in the Functional Pin Description section beginning on
page 14.
Pin Number
18
19
20
21
Pin Name
DM
DP
ID
GND
Pin Function
IO
IO
Input
Ground
Formal Name
D- of the USB
connector
D+ of the USB
connector
ID of the USB
connector
Ground
Definition
D- line of the mini-USB connector
D+ line of the mini-USB connector
ID pin of the mini-USB connector
Ground
MC34827
Analog Integrated Circuit Device Data
Freescale Semiconductor
5
模拟与混合信号
