UM10503
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
591 of 1269
NXP Semiconductors
UM10503
Chapter 24: LPC43xx USB1 Host/Device controller
24.6.1 Device/host capability registers
Table 455. CAPLENGTH register (CAPLENGTH - address 0x4000 7100) bit description
Bit
Symbol
Description
Reset value Access
7:0
CAPLENGTH
Indicates offset to add to the register base
address at the beginning of the Operational
Register
0x40
RO
23:8
HCIVERSION
BCD encoding of the EHCI revision number
supported by this host controller.
0x100
RO
31:24
-
These bits are reserved and should be set to
zero.
-
-
Table 456. HCSPARAMS register (HCSPARAMS - address 0x4000 7104) bit description
Bit
Symbol
Description
Reset value Access
3:0
N_PORTS
Number of downstream ports. This field
specifies the number of physical
downstream ports implemented on this host
controller.
0x1
RO
4
PPC
Port Power Control. This field indicates
whether the host controller implementation
includes port power control.
0x1
RO
7:5
-
These bits are reserved and should be set
to zero.
-
-
11:8
N_PCC
Number of Ports per Companion Controller.
This field indicates the number of ports
supported per internal Companion
Controller.
0x0
RO
15:12
N_CC
Number of Companion Controller. This field
indicates the number of companion
controllers associated with this USB2.0 host
controller.
0x0
RO
16
PI
Port indicators. This bit indicates whether
the ports support port indicator control.
0x1
RO
19:17
-
These bits are reserved and should be set
to zero.
-
-
23:20
N_PTT
Number of Ports per Transaction Translator.
This field indicates the number of ports
assigned to each transaction translator
within the USB2.0 host controller.
0x0
RO
27:24
N_TT
Number of Transaction Translators. This
field indicates the number of embedded
transaction translators associated with the
USB2.0 host controller.
0x0
RO
31:28
-
These bits are reserved and should be set
to zero.
-
-