Datasheet

© 2010 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA801 • Rev. 1.0.3 4
FSA801 — USB2.0 High-Speed (480Mbps), UART, and Audio Switch with Negative Signal Capability
Pin Configuration
Figure 2. 16-Pin, UMLP Pin Assignments (Top-Through View)
Pin Descriptions
Name Pin # Description
USB, UART Interface
DP_HOST1 1
D+ signal, dedicated USB port to be connected to the resident USB or UART transceiver on
the phone.
DM_HOST1 2
D- signal, dedicated USB port to be connected to the resident USB or UART transceiver on
the phone.
DP_HOST2
3 D+ signal, dedicated USB port to be connected to the resident USB or UART transceiver on
the phone.
DM_HOST2
4 D- signal, dedicated USB port to be connected to the resident USB or UART transceiver on
the phone.
Audio Interface
R_HOST 5 Right audio channel from phone audio codec.
L_HOST 6 Left audio channel from phone audio codec.
MIC_HOST 7 Connected to the phone audio codec MIC input pin.
Power Interface
V
CC
16 Input voltage supply pin to be connected to the phone battery output.
Connector Interface
V
BUS
12 Input voltage supply pin to be connected to the V
BUS
pin of the USB connector.
GND 8 Ground.
DP_CON
11 Connected to the USB connector D+ pin; depending on the FSA801 signaling mode, this pin
can share DP_HOST1, DP_HOST2 or R_HOST signals.
DM_CON
10 Connected to the USB connector D- pin; depending on the FSA801 signaling mode, this pin
can share DM_HOST1, DM_HOST2 or L_HOST signals.
Charger Detection
CD_N 9 Active-LOW, open-drain output pin; requires pull-up resistor to baseband I/O voltage supply
Switch Control
SEL[2:0] 13-15 Switch selection pins; refer to Table 1 for truth table.