Acer Extensa 61X Service Manual page 123

Table 2-13 PCI1131 Pin Descriptions (Continued)
TERMINAL
Name Slot
Slot
A+ B
1 6-bit PC Card Address and Data (Slots A and B)
D15 93 27
D14 91 25
D13 89 23
D12 87 20
D11 84 18
D10 147 81
D9 145 79
D8 142 77
D6 90 24
D5 88 21
D4 85 19
D3 83 17
D2 146 80
D1 144 78
D0 141 76
1 6-bit PC Card Interface Control Signals (Slots A and B)
CD1 82 16
CD2 140 74
BVD1
(STSCHG/ 138
72
RI)
Terminal name is preceded with A_. As an example, the full name for terminal 121 is A_A25.
Terminal name is preceded with B_. As an example, the full name for terminal 55 is B_A25.
2-66
I/O
TYPE
I/O PC Card Data. 16-bit PC Card data lines. D15 is the most significant
bit.
I PC Card Detect 1 and Card Detect 2. CD1 and CD2 are connected to
ground internally on the PC Card. When a PC Card is inserted into a
socket, these signals are pulled low. The signal status is available by
reading the Interface Status Register
I Battery Voltage Detect 1. Generated by 16-bit memory PC Cards that
include batteries. BVD1 is used with BVD2 as an indication of the
condition of the batteries on a memory PC Card. Both BVD1 and BVD2
are kept high when the battery is good. When BVD2 is low and BVD1 is
high, the battery is weak and needs to be replaced. When BVD1 is low,
the battery is no longer serviceable and the data in the memory PC
Card is lost. See the Card Status Change Interrupt Configuration
Register for enable bits (Section 8.6). See the Card Status Change
Register and the Interface Status Register for the status bits for this
signal.
Status Change. STSCHG is used to alert the system to a change in the
READY, Write Protect, or Battery Voltage Dead condition of a 16-bit I/O
PC Card.
Ring Indicate. RI is used by 1 6-bit modem cards to indicate ring
detection.
FUNCTION
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