Owners manual

Interfaces
H3 Datasheet(Revision1.2) Copyright© 2015 Allwinner Technology Co.,Ltd.All Rights Reserved. Page 490
8.5.2.5. EHCI Register Description
8.5.2.5.1. EHCI Identification Register(Default Value: Implementation Dependent)
Offset: 0x0000
Register Name: CAPLENGTH
Bit
R/W
Default/Hex
Description
7:0
R
0x10
CAPLENGTH
The value in these bits indicates an offset to add to register base to find the
beginning of the Operational Register Space.
8.5.2.5.2. EHCI Host Interface Version Number Register(Default Value: 0x0100)
Offset: 0x0002
Register Name: HCIVERSION
Bit
R/W
Default/Hex
Description
15:0
R
0x0100
HCIVERSION
This is a 16-bits register containing a BCD encoding of the EHCI revision
number supported by this host controller. The most significant byte of this
register represents a major revision and the least significant byte is the
minor revision.
8.5.2.5.3. EHCI Host Control Structural Parameter Register(Default Value: Implementation Dependent)
Offset: 0x0004
Register Name: HCSPARAMS
Bit
R/W
Default/Hex
Description
31:24
/
0
Reserved.
These bits are reserved and should be set to zero.
23:20
R
0
Debug Port Number
This register identifies which of the host controller ports is the debug port.
The value is the port number (one based) of the debug port.
This field will always be ‘0’.
19:16
/
0
Reserved.
These bits are reserved and should be set to zero.
15:12
R
0
Number of Companion Controller (N_CC)
This field indicates the number of companion controllers associated with
this USB2.0 host controller. A zero in this field indicates there are no
companion host controllers. And a value larger than zero in this field
indicates there are companion USB1.1 host controller(s).
This field will always be ‘0’.
11:8
R
0
Number of Port per Companion Controller(N_PCC)
This field indicates the number of ports supported per companion host
controller host controller. It is used to indicate the port routing configuration
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