UM10503
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© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
511 of 1269
NXP Semiconductors
UM10503
Chapter 23: LPC43xx USB0 Host/Device/OTG controller
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. -
-
Table 396. HCCPARAMS register (HCCPARAMS - address 0x4000 6108) bit description
Bit
Symbol
Description
Reset
value
Access
0
ADC
64-bit Addressing Capability. If zero, no 64-bit addressing
capability is supported.
0
RO
1
PFL
Programmable Frame List Flag. If set to one, then the
system software can specify and use a smaller frame list
and configure the host controller via the USBCMD register
Frame List Size field. The frame list must always be
aligned on a 4K-boundary. This requirement ensures that
the frame list is always physically contiguous.
1
RO
2
ASP
Asynchronous Schedule Park Capability. If this bit is set to
a one, then the host controller supports the park feature
for high-speed queue heads in the Asynchronous
Schedule.The feature can be disabled or enabled and set
to a specific level by using the Asynchronous Schedule
Park Mode Enable and Asynchronous Schedule Park
Mode Count fields in the USBCMD register.
1
RO
7:4
IST
Isochronous Scheduling Threshold. This field indicates,
relative to the current position of the executing host
controller, where software can reliably update the
isochronous schedule.
0
RO
15:8
EECP
EHCI Extended Capabilities Pointer. This optional field
indicates the existence of a capabilities list.
0
RO
31:16
-
These bits are reserved and should be set to zero.
-
-
Table 397. DCIVERSION register (DCIVERSION - address 0x4000 6120) bit description
Bit
Symbol
Description
Reset
value
Access
15:0
DCIVERSION The device controller interface conforms to the
two-byte BCD encoding of the interface version
number contained in this register.
0x1
RO
Table 395. HCSPARAMS register (HCSPARAMS - address 0x4000 6104)
…continued
bit
Bit
Symbol
Description
Reset
value
Access