F81866A
S5# input. This pin companies with S3# to indicate
the operating state from S0 to S3 and S4/S5 sleep
states.
S5#
INst,5v
87
I_VSB3V
GPIO67
I/OD12st,5v
General purpose IO.
5.9 UART, GPIO
Pin Name
Pin
Type
PWR
Description
Data Carrier Detect. An active low signal indicates the
modem or data set has detected a data carrier.
Ring Indicator. An active low signal indicates that a
1
DCD2#
INst,5v
3VCC
2
3
RI2#
INst,5v
INst,5v
O8
I_VSB3V ring signal is being received from the modem or data
set. Support wake up function.
Clear To Send is the modem control input.
CTS2#
DTR2#
3VCC
UART Data Terminal Ready. An active low signal
informs the modem or data set that controller is ready
to communicate.
Power on Strapping pin for over voltage protection
(OVP).
4
3VCC
1: Default is disabled; internal pull high 47k Ω .
Voltage protection function is enabled via setting the
related registers.
OVP_Mode
RTS2#
INt,u47, 5v
0: Enable OVP function.
UART Request To Send. An active low signal informs
the modem or data set that the controller is ready to
send data.
O8
5
6
3VCC
3VCC
Power on Strapping pin
KBC_EN_TRAP
DSR2#
INt,u47, 5v
1: KBC enable (Default, internal pull high 47k Ω ).
0: KBC disable.
Data Set Ready. An active low signal indicates the
INst,5v
modem or data set is ready to establish
communication link and transfer data to the UART.
a
UART Serial Output. Used to transmit serial data out
to the communication link.
7
8
SOUT2
SIN2
O8
3VCC
3VCC
UART Serial Input. Used to receive serial data
through the communication link.
INst,5v
Data Carrier Detect. An active low signal indicates the
modem or data set has detected a data carrier.
General Purpose IO.
DCD3#
INst,5v
36
3VCC
GPIO30
I/OOD8st, 5v
Ring Indicator. An active low signal indicates that a
ring signal is being received from the modem or data
set.
RI3#
INst,,5v
37
38
3VCC
3VCC
GPIO31
CTS3#
I/OOD8st, 5v
INst,5v
General Purpose IO.
Clear To Send is the modem control input.
General Purpose IO.
GPIO32
I/OOD8st, 5v
25
Jan, 2012
V0. 12P
FINTEK [ FEATURE INTEGRATION TECHNOLOGY INC. ]
