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Pin Signal
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49 Address bit 20
50 Address bit 21
51 Power
52 Programming and peripheral supply 2
53 Address bit 22
54 Address bit 23
55 Address bit 24
56 Address bit 25
57 Reserved
58 Card reset
59 Extend bus cycle
60 Input port acknowledge
61 Register select and IO enable
62 Battery voltage detect 2/Audio digital waveform
63 Battery voltage detect 1/Card status changed
64 Data bit 8
65 Data bit 9
66 Data bit 10
67 Card detect 2
68 Ground
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