IT8673F View Datasheet(PDF) - ITE Tech. INC.
Part Name
Description
Manufacturer
IT8673F Datasheet PDF : 128 Pages
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IT8673F
Pin(s) No.
Signal
49
SOUT1
Serial Port 2 Signals
62
CTS2#
57
DCD2#
60
DSR2#
63
DTR2#/
KBCEN
56
RI2#
61
RTS2#/
KBC_IROM
58
SIN2
59
SOUT2
Parallel Port Signals
100
SLCT
101
PE
102
BUSY
103
ACK#
I/O
DO8
Power
VCC
Description
• Serial Data Out 1. This output sends serial data to the
communications link. This signal is set to a marking state (logic 1)
after a Master Reset operation or when the device is in one of the
Infrared communications modes.
DI
DI
DI
DO8/DI
DI
DO8/DI
DI
DO8
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
Clear to Send 2 #. When low, indicates that the MODEM or Data
Set is ready to accept data. The CTS# signal is a MODEM status
input whose condition can be tested by reading the MSR register.
Data Carrier Detect 2 # . When low, indicates that the MODEM or
Data Set has detected a carrier. The DCD# signal is a MODEM
status input whose condition can be tested by reading the MSR
register.
Data Set Ready 2 #. When low, indicates that the MODEM or Data
Set is ready to establish a communications link. The DSR# signal is
a MODEM status input whose condition can be tested by reading the
MSR register.
Data Terminal Ready 2 # / KBC Enable.
• The default function of this pin is Data Terminal Ready 2 #. DTR#
is used to indicate to the MODEM or Data Set that the device is
ready to exchange data. DTR# is activated by setting the
appropriate bit in the MCR register to 1. After a Master Reset
operation or during Loop mode, DTR# is set to its inactive state.
• The second function of this pin is the power-on strapping of KBC
(LDN 4) enable. This pin is weak pull-up internally.
Ring Indicator 2 #. When low, indicates that a telephone ring signal
has been received by the MODEM. The RI# signal is a MODEM
status input whose condition can be tested by reading the MSR
register.
Request to Send 2 # / KBC Internal ROM Selected
• The default function of this pin is Request To Send 2 #. When low,
this output indicates to the MODEM or Data Set that the device is
ready to send data. RTS# is activated by setting the appropriate bit
in the MCR register to 1. After a Master Reset operation or during
Loop mode, RTS# is set to its inactive state.
• The second function of this pin is the power-on strapping of KBC
intrusion ROM select. When high (default), the internal ROM is
selected. When low, the external ROM is selected. This pin is
weak pull-up internally.
Serial Data In 2. This input receives serial data from the
communications link.
Serial Data Out 2. This output sends serial data to the
communications link. This signal is set to a marking state (logic 1)
after a Master Reset operation or when the device is in one of the
Infrared communications modes.
DI
VCC Printer Select. This signal goes high when the line printer has been
selected.
DI
VCC Printer Paper End. This signal is set high by the printer when it runs
out of paper.
DI
VCC Printer Busy. This signal goes high when the line printer has a local
operation in progress and cannot accept data.
DI
VCC Printer Acknowledge #. This signal goes low to indicate that the
printer has already received a character and is ready to accept
another.
8
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