Acer 390 Series Service Manual page 99

Table 2-6 FDC37C67 Pin Descriptions
Pin No./QFP
3 Maor On D
6 Motor On 1
15 Write Protected
14 Track O
13 Index Pulse Input
1 Drive Density Select O
2 Drive Density Select 1 /IR Mode
Select/lRRX3
Serial Port 1 Interface(8)
84 Receive Serial Data 1
85 Transmit Serial Data 1
87 Request to Send 1
88 Clear to Send 1
89 Data Terminal Ready 1
86 Data Set Ready 1
91 Data Carrier Detect 1
90 Ring Indicator 1
Serial Port 2 Interface (8)
95 Receive Serial Data 2/lnfrared Rx
96 Transmit Serial Data 2/lnfrared
Tx
98 Request to Send 2/Sys Addr 12/
Parallel IRQ 5
99 Clear to Send 2/Sys Addr 13/
Parallel IRQ 6
100 Data Terminal Ready/Sys Addr
14/ Parallel IRQ 7
97 Data Set Ready 2/Sys Addr 15/
Parallel IRQ 1 O/nSMI
94 Data Carrier Detect 2/8042 P12/
Parallel IRQ 1 1
92 Ring Indicator 2/8042 P1
6/Parallel IRQ 12
Parallel Port Interface {17)
68:75 Parallel Port Data Bus
67 Printer Select
66 Initiate Output
82 Auto Line Feed
83 Strobe Signal
79 Busy Signal
80 Acknowledge Handshake
Major Chips Description
Pin Name Type Symbol
1 nMTR0
1 nMTR1
1 nWRTPRT
1 nTRKO
1 nINDEX
1 DRVDENO
1 DRVDEN1/IR
MODE/ IRRX3
1 RXD1
1 TXD1
1 nRTS1/SYSOP
1 nCTS 1
1 nDTR 1
1 nDSR 1
1 nDCD1
1 nRI1
1 RXD2/lRRX
1 TXD2/lRTX
1 nRTS2/SA12/
IRQ5
1 nCTS2/SA 13/
IRQ6
1 nDTR2/SA 14/
IRQ7
1 nDSR2/SA1 5/
IRQ10/nSMI
1 nDCD2/P12/
IRQ11
1 nRI2/P16/ IRQ12
8 PD[0:7]
1 nSLCTIN
1 nlNIT
1 nALF
1 nSTROBE
1 BUSY
1 nACK
Buffer Type
O224/OD24
O224/OD24
IS
IS
IS
O224/OD24
O224/OD24/O24/I
I
O4
O4/I
I
O4
I
I
I
I
O24
O4/I/O24/OD24(Note0
)
I/I/O24/OD24(Note0)
O4/I/O24/OD24(Note0
)
I/I/O24/OD24(Note0)
I/IO24/O24(Note0)
I/IO24/O24/OD24
(Note0)
IO24
OD24/O24
OD24/O24
OD24/O24
OD24/O24
I
I
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