PC87393VJG National Semiconductor, PC87393VJG Datasheet - Page 22

• Manufacturer Part Number: PC87393VJG
• Description: IC, SUPER I/O DEVICE, TQFP-100
• Manufacturer: National Semiconductor

Specifications of PC87393VJG

• Data Rate: 2Mbps
• Supply Voltage Range: 3V to 3.6V
• Logic Case Style: TQFP
• No. Of Pins: 100
• Operating Temperature Range: 0°C to +70°C
• Termination Type: SMD
• Transceiver Type: Interface
• Rohs Compliant: No

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1.0 Signal/Pin Connection and Description
1.5.10 Serial Port 1 and Serial Port 2 (SP1 and SP2)
CTS1
CTS2
DCD1
DCD2
DSR1
DSR2
DTR1_
BOUT1
DTR2_
BOUT2
RI1
RI2
RTS1
RTS2
SIN1
SIN2
SOUT1
SOUT2
Signal
60
79
55
74
56
75
61
80
62
81
58
77
57
76
59
78
Pin/s
I/O Buffer Type Power Well
O
O
O
I
I
I
I
I
IN
IN
IN
IN
IN
O
O
O
3/6
3/6
3/6
TS
TS
TS
TS
TS
V
V
V
V
V
V
V
V
DD
DD
DD
DD
DD
DD
DD
DD
Clear to Send. When low, indicate that the modem or other data
transfer device is ready to exchange data.
Data Carrier Detected. When low, indicate that the modem or
other data transfer device has detected the data carrier.
Data Set Ready. When low, indicate that the data transfer device,
e.g., modem, is ready to establish a communications link.
Data Terminal Ready. When low, indicate to the modem or other
data transfer device that the UART is ready to establish a
communications link. After a system reset, these pins provide the
DTR function and set these signals to inactive high. Loopback
operation holds them inactive.
Baud Output. Provides the associated serial channel baud rate
generator output signal if test mode is selected, i.e., bit 7 of the
EXCR1 register is set.
DTR1_BOUT1 is used also as BADDR.
Ring Indicator. When low, indicate that a telephone ring signal
has been received by the modem. They are monitored during
power-off for wake-up event detection.
Request to Send. When low, indicate to the modem or other data
transfer device that the corresponding UART is ready to exchange
data. A system reset sets these signals to inactive high, and
loopback operation holds them inactive.
RTS1 is used also as TEST.
Serial Input. Receive composite serial data from the
communications link (peripheral device, modem or other data
transfer device).
Serial Output. Send composite serial data to the communications
link (peripheral device, modem or other data transfer device).
These signals are set active high after a system reset.
22
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Description