FreeCalypso > hg > freecalypso-schem2

annotate venus/src/pinouts/74LVC541A.pinout @ 96:ae6951a70d2b

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U403: change from 74LVC2G125 to 74LVC2G126 The two parts have the same footprint and pinout, but '126 3-state buffers have active-high OE inputs instead of active-low. The change is purely for software benefit: having GPIO 11/12 set to 1 correspond to that current contribution being enabled will be much more intuitive for developers and tinkerers.
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 09 May 2022 19:27:11 +0000
parents 975b9b7ec712
children
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975b9b7ec712 Venus MCL: add 74LVC125A for Calypso UART inputs
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1 #pin name pin number
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2 nOE1 1
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3 A:0 2
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4 A:1 3
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5 A:2 4
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6 A:3 5
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7 A:4 6
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8 A:5 7
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9 A:6 8
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10 A:7 9
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11 GND 10
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12 Y:7 11
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15 Y:4 14
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16 Y:3 15
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17 Y:2 16
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18 Y:1 17
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19 Y:0 18
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20 nOE2 19
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21 Vcc 20