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Acer 390 Series Service Manual Page 54

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Table 2-2
PCI1250 Terminal Functions
Name
STOP
T17
TRDY
U20
PC Card 16 Address And Data Terminals (Slot A And Slot B)
Slot A
A25
T04
A24
U02
A23
U01
A22
P04
A21
R02
A20
R01
A19
P01
A18
N02
A17
M04
A16
T01
A15
T02
A14
P02
A13
N03
A12
T03
A11
M01
A10
L01
A9
M03
A8
N01
A7
V01
A6
V02
A5
V03
A4
W02
A3
W03
A2
W04
A1
V04
A0
U05
1
Terminal name for slot A is preceded with A_. For example, the full name for terminal T04 is A_A25.
2
Terminal name for slot B s preceded with B_. For example, the full name for terminal C14 is B_A25.
2-8
No.
I/O Type
I/O
I/O
1
2
Slot B
C14
O
B15
C15
C16
A18
C17
B18
A20
C18
A17
A16
B17
A19
D14
D18
E18
B20
B19
A15
A14
B13
A13
C12
A12
B11
C11
Function
PCI cycle stop signal. This signal is driven by a PCI
target to request the initiator to stop the current PCI
bus tranaction. This signal is used for target
disconnects and is commonly asserted by target
devices which do not support burst data transfers.
PCI target ready. TRDY indicates the primary bus
target s ability to complete the current data phase
of the transaction. A data phase is completed upon
a rising edge of PCLK where both IRDY and TRDY
are asserted. Until both IRDY and TRDY are
asserted, wait states are inserted.
PC Card Address 16-bit PC Card address lines.
A25 is the most significant bit
Service Guide

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