IBM 8646 Hardware Maintenance Manual - Page 78

USB cables and hubs, USB-port connectors, Keyboard port

Get IBM 8646 - Eserver xSeries 220 PDF manuals and user guides View all IBM 8646 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 78 highlights

2. If you install a USB keyboard that has a mouse port, the USB keyboard emulates a mouse, and you will not be able to disable the mouse settings in the Configuration/Setup Utility program. USB cables and hubs You need a 4-pin cable to connect devices to USB 1 or USB 2. If you plan to attach more than two USB devices, you must use a hub to connect the devices. The hub provides multiple connectors for attaching additional external USB devices. USB technology provides up to 12 megabits-per-second (Mbps) speed with a maximum of 127 external devices and a maximum signal distance of five meters (16 ft) per segment. USB-port connectors Each USB port has an external connector on the system board for attaching USB-compatible devices. The following table shows the pin-number assignments for the USB-port connectors on the system board. Table 12. USB-port connector pin-number assignments Pin Signal 1 +5 V dc 2 -Data 3 +Data 4 Ground Keyboard port There is one keyboard port on the system board. Note: If you attach a standard (non-USB) keyboard to the keyboard connector, the USB ports and devices will be disabled during the power-on self-test (POST). The following table shows the pin-number assignments for the keyboard connector on the system board. 6 4 2 5 3 1 Table 13. Keyboard connector pin-number assignments Pin I/O Signal 1 I/O Data 2 N/A Reserved 3 N/A Ground 4 N/A +5 V dc 5 I/O Clock 6 N/A Reserved 70 Hardware Maintenance Manual: xSeries 220 Type 8646

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
2.
If you install a USB keyboard that has a mouse port, the USB keyboard
emulates a mouse, and you will not be able to disable the mouse settings in the
Configuration/Setup Utility program.
USB cables and hubs
You need a 4-pin cable to connect devices to USB 1 or USB 2. If you plan to attach
more than two USB devices, you must use a hub to connect the devices. The hub
provides multiple connectors for attaching additional external USB devices.
USB technology provides up to 12 megabits-per-second (Mbps) speed with a
maximum of 127 external devices and a maximum signal distance of five meters
(16 ft) per segment.
USB-port connectors
Each USB port has an external connector on the system board for attaching
USB-compatible devices.
The following table shows the pin-number assignments for the USB-port
connectors on the system board.
Table 12. USB-port connector pin-number assignments
Pin
Signal
1
+5 V dc
2
-Data
3
+Data
4
Ground
Keyboard port
There is one keyboard port on the system board.
Note:
If you attach a standard (non-USB) keyboard to the keyboard connector, the
USB ports and devices will be disabled during the power-on self-test
(POST).
The following table shows the pin-number assignments for the keyboard connector
on the system board.
6
4
2
1
3
5
Table 13. Keyboard connector pin-number assignments
Pin
I/O
Signal
1
I/O
Data
2
N/A
Reserved
3
N/A
Ground
4
N/A
+5 V dc
5
I/O
Clock
6
N/A
Reserved
70
Hardware Maintenance Manual: xSeries 220 Type 8646