CS5530A datasheet(216/259 Pages) NSC

216 / 259 page

www.national.com

216

Revision 1.1

Offset 4Ch-4Fh

HcRhDescriptorB Register (R/W)

Reset Value = 00000000h

31:16

PortPowerControlMask: Global-power switching. This field is only valid if NoPowerSwitching is cleared and PowerSwitch-

ingMode is set (individual port switching). When set, the port only responds to individual port power switching commands

(Set/ClearPortPower). When cleared, the port only responds to global power switching commands (Set/ClearGlobalPower).

0 = Device not removable; 1 = Global-power mask.

Port Bit relationship - Unimplemented ports are reserved, read/write 0.

0= Reserved

1= Port 1

2= Port 2

...

15 = Port 15

15:0

DeviceRemoveable: USB ports default to removable devices. 0 = Device not removable; 1 = Device removable.

Port Bit relationship

0= Reserved

1= Port 1

2= Port 2

...

15 = Port 15

Unimplemented ports are reserved, read/write 0.

Note: This register is only reset by a power-on reset (PCIRST#). It is written during system initialization to configure the Root Hub.

These bit should not be written during normal operation.

Offset 50h-53h

HcRhStatus Register (R/W)

Reset Value = 00000000h

ClearRemoteWakeupEnable (Write Only): Writinga1tothisbit clears DeviceRemoteWakeupEnable. Writing a 1 has no

effect.

30:18

Reserved: Read/Write 0s.

OverCurrentIndicatorChange: This bit is set when OverCurrentIndicator changes. Writing a 1 clears this bit. Writing a 0

has no effect.

Read: LocalPowerStatusChange: Not supported. Always read 0.

Write: SetGlobalPower: Write a 1 issues a SetGlobalPower command to the ports. Writing a 0 has no effect.

Read: DeviceRemoteWakeupEnable: This bit enables ports' ConnectStatusChange as a remote wakeup event.

0 = Disabled; 1 = Enabled.

Write = SetRemoteWakeupEnable: Writing a 1 sets DeviceRemoteWakeupEnable. Writing a 0 has no effect.

14:2

Reserved: Read/Write 0s.

OverCurrentIndicator: This bit reflects the state of the OVRCUR pin. This field is only valid if NoOverCurrentProtection and

OverCurrentProtectionMode are cleared. 0 = No over-current condition; 1 = Over-current condition.

Read: LocalPowerStatus: Not Supported. Always read 0.

Write: ClearGlobalPower: Writing a 1 issues a ClearGlobalPower command to the ports. Writing a 0 has no effect.

Note: This register is reset by the UsbReset state.

Table 4-26. USB BAR+Memory Offset xxh: USB Controller Registers (Continued)

Bit

Description

CS5530A Datasheet(PDF) 216 Page - National Semiconductor (TI)

CS5530A Datasheet(HTML) 216 Page - National Semiconductor (TI)

Html Pages

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 ...More

Datasheet Download

Link URL