IT8687R View Datasheet(PDF) - ITE Tech. INC.
Part Name
Description
Manufacturer
IT8687R Datasheet PDF : 12 Pages
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IT8687R
5. IT8687R Pin Description
Table 5-1. Signal Names (by pin numbers in alphabetical order)
Pin No.
Symbol
I/O
Description
1
UIF4/LTX1
IS Serial ports 1,2 signals sample clock input. The second function is Serial
Port 1 TX line driver input.
2
UIF3/LRTS1
IS Serial ports 1,2 transfer cycle indicator. The second function is Serial Port 1
RTS line driver input.
3
UIF2/LRLSD1
O18 Serial port 2 signals RLSD2, RX2, DSR2, CTS2, RI2 mixing-signal output
pin. The second function is Serial Port 1 RLSD line receiver output.
4
UIF1/LRX1
O18 Serial port 1 signals RLSD1, RX1, DSR1, CTS1, RI1 mixing-signal output
pin. The second function is Serial Port 1 RX line receiver output.
5
UIF0/LDTR1
IS Serial ports 1,2 signals TX1, TX2, RTS1, RTS2, DTR1, DTR2 mixing-signal
input pin. The second function is Serial Port 1 DTR line driver input.
7
CLKOUT
O8 Output clock generated by the crystal oscillator
8
X2
O Crystal oscillator output
9
X1
I
Crystal oscillator input
10
RAD2/LDSR1
O18 ISA signal encoding output pin 2. The second function is Serial Port 1 DSR
line receiver output.
11
RAD1/LCTS1
O18 ISA signal encoding output pin 1. The second function is Serial Port 1 CTS
line receiver output.
12
RAD0/LRI1
O18 ISA signal encoding output pin 0. The second function is Serial Port 1 RI
line receiver output.
14
DACK3#/ LRLSD2 I/O18 ISA DMA Acknowledge 3, active low. The second function is Serial Port 2
RLSD line receiver output.
15
DACK2#/ LRX2 I/O18 ISA DMA Acknowledge 2, active low. The second function is Serial Port 2
RX line receiver output.
16
DACK1#
IS ISA DMA Acknowledge 1, active low
17
DACK0#/ LTX2
IS ISA DMA Acknowledge 0, active low. The second function is Serial Port 2
TX line driver input.
18
AEN/LDSR2
I/O18 Address Enable, active high indicates system is in DMA transfer mode. The
second function is Serial Port 2 DSR line receiver output.
20
SA15/LCTS2
I/O18 ISA I/O Address 15. The second function is Serial Port 2 CTS line receiver
output.
21
SA14/LRI2
I/O18 ISA I/O Address 14. The second function is Serial Port 2 RI line receiver
output.
3
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