4-24
Theory of Operation
Table 4-5 M6377 GPIO Port Definitions (Continued)
Item
Description
GPIO20
(W/R)
GPIO20 is the common CLK for below serial BUS:
A. For Charger ROM, Inverter ROM, MPB ROM serial BUS.
B. For Brightness & Contrast control.
C. For Feature board.
GPIO37
(W/R)
GPIO37 is serial DATA for Feature board serial BUS, and GPIO20 is the serial CLK.
GPIO36
(W/R)
1: Normally
0: Disable MPB power.
GPIO35
GPIO34
GPIO33
(W/R)
The system use 3-wire BUS to communicate with thermal sensor (DS1620). These functions are
shown as below:
GPIO35 1: Enable DS1620.
0: Disable DS1620.
GPIO34 is CLK for 3-wire BUS .
GPIO33 is DATA, must be valid during the rising edge of CLK(GPIO34).
GPIO32
(W/R)
1: Normally
0: System into STANDBY mode.
GPIO31
(W/R)
1: Enable 1394 power.
0: Disable 1394 power.
GPIO30
(W/R)
1: Go to 5V suspend.
0: Normally
SE12
(W)
1: Normally
0: Disable notebook’s OP amplify.
SE11(W)
SE10(W)
Reserved
GPIO7
1: Media bay switch is unlocked.
0: Media bay switch is locked.
GPIO6
1: MPB is connected.
0: MPB is disconnected.
GPIO5
received
GPIO2
1: No FDD connected.
0: FDD connected.
GPIO1
0: No 2
nd
channel IDE device connected
1: 2
nd
channel IDE device connected.
GPI00
1: Parallel port connected with FDD while the parallel port SMI occured.
0: Parallel port connect with printer.
Содержание Extensa 900 Series
Страница 1: ...Maintenance Manual ExtensaTM 900 Series Notebook Computers 9813715 0001 December 1996 ...
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Страница 138: ...A 2 Notebook Schematic Diagrams Figure A 1 Notebook Main Board Logic Diagrams Sheet 1 of 30 ...
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Страница 148: ...A 12 Notebook Schematic Diagrams Figure A 1 Motherboard PWB Logic Diagrams Sheet 11 of 23 ...
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Страница 171: ...MPB Schematic Diagrams B 3 Figure B 1 MPB CPU Board Logic Diagrams Sheet 2 of 3 ...
Страница 176: ...B 8 MPB Schematic Diagrams Figure B 3 MPB Main Board Motherboard Logic Diagrams Sheet 3 of 10 ...
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