參數資料
型號: STPCI2HEYI
英文描述: PERIPHERAL (MULTIFUNCTION) CONTROLLER
中文描述: 周邊(多功能)控制器
文件頁數: 34/71頁
文件大?。?/td> 1071K
代理商: STPCI2HEYI
STRAP OPTION
34/69
Issue 2.4 - February 11, 2002
3.1.5. STRAP REGISTER 4
Bits 5-0 of this register reflect the status of pins MD[53:48] respectively.
Strap4
Access = 0022h/0023h
Regoffset = 03Dh
7
6
5
4
3
2
1
0
Rsv
MD52
MD51
MD50
MD49
MD48
This register defaults to the values sampled on MD[53:48] pins after reset
Bit Number Sampled
Mnemonic
Description
Bits 7-5
Rsv
Reserved.
Bit 4
MD52
y.y V present on board. This bit reflects the
value sampled on MD[52]
pin
and is used to notify the Cardbus socket management unit if the y.y
V vcc voltage (where y.y is less than x.x) is present on board as follows
Setting to ’0’, y.y V Vcc voltage is not available.
Setting to ’1’: y.y V Vcc voltage is available.
Bit 3
MD51
x.x V present on board. This bit reflects the
value sampled on MD[51]
pin
and is used to notify the Cardbus socket management unit if the x.x
V vcc voltage (where x.x is less than 3.3) is present on board as follows:
Setting to ’0’, x.x V Vcc voltage is not available.
Setting to ’1’: x.x V Vcc voltage is available.
Bit 2
MD50
3.3 V present on board. This bit reflects the
value sampled on MD[50]
pin
and is used to notify the Cardbus socket management unit if the 3.3
V vcc voltage is present on board as follows:
Setting to ’0’, 3.3 V vcc voltage is not available.
Setting to ’1’, 3.3 V vcc voltage is available.
Bit 1
MD49
5 V present on board. This bit reflects the
value sampled on MD[49]
pin
and is used to notify the Cardbus socket management unit if the 5 V
vcc voltage is present on board as follows:
Setting to ’0’, 5 V vcc voltage is not available.
Setting to ’1’, 5 V vcc voltage is available.
Bit 0
MD48
This bit reflects the
value sampled on MD[48] pin
and is used to enable
the TFT controller outputs.
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