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UM10503
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© NXP B.V. 2015. All rights reserved.
User manual
Rev. 2.1 — 10 December 2015
746 of 1441
NXP Semiconductors
UM10503
Chapter 26: LPC43xx/LPC43Sxx USB1 Host/Device controller
26.6.7.2 Host mode
This 32-bit register contains the address of the next asynchronous queue head to be
executed by the host. Bits [4:0] of this register cannot be modified by the system software
and will always return a zero when read.
26.6.8 TT Control register (TTCTRL)
26.6.8.1 Device mode
This register is not used in device mode.
26.6.8.2 Host mode
This register contains parameters needed for internal TT operations. This register is used
by the host controller only. Writes must be in Dwords.
26.6.9 Burst Size register (BURSTSIZE)
This register is used to control and dynamically change the burst size used during data
movement on the master interface of the USB DMA controller. Writes must be in Dwords.
The default for the length of a burst of 32-bit words for RX and TX DMA data transfers is
16 words each.
Table 542. USB Endpoint List Address register in device mode (ENDPOINTLISTADDR - address 0x4000 7158) bit
description
Bit
Symbol
Description
Reset
value
Access
10:0
-
reserved
0
-
31:11
EPBASE31_11
Endpoint list pointer (low)
These bits correspond to memory address signals 31:11, respectively. This
field will reference a list of up to 8 Queue Heads (QH). (i.e. one queue head
per endpoint and direction.)
N/A
R/W
Table 543. USB Asynchronous List Address register in host mode (ASYNCLISTADDR- address 0x4000 7158) bit
description
Bit
Symbol
Description
Reset
value
Access
4:0
-
Reserved
0
-
31:5
ASYBASE31_5
Link pointer (Low) LPL
These bits correspond to memory address signals 31:5, respectively. This
field may only reference a Queue Head (OH).
-
R/W
Table 544. USB TT Control register in host mode (TTCTRL - address 0x4000 715C) bit description
Bit
Symbol
Description
Reset
value
Access
23:0
-
Reserved.
0
-
30:24
TTHA
Hub address when FS or LS device are connected directly.
N/A
R/W
31
-
Reserved.
0