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UM10503
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© NXP B.V. 2015. All rights reserved.
User manual
Rev. 2.1 — 10 December 2015
751 of 1441
NXP Semiconductors
UM10503
Chapter 26: LPC43xx/LPC43Sxx USB1 Host/Device controller
26.6.14 USB Endpoint NAK Enable register (ENDPTNAKEN)
26.6.14.1 Device mode
Each bit in this register enables the corresponding bit in the ENDPTNAK register. Each Tx
and Rx endpoint has a bit in the EPTNE and EPRNE field respectively.
26.6.14.2 Host mode
This register is not used in host mode.
26.6.15 Port Status and Control register (PORTSC1)
26.6.15.1 Device mode
The device controller implements one port register, and it does not support power control.
Port control in device mode is used for status port reset, suspend, and current connect
status. It is also used to initiate test mode or force signaling. This register allows software
to put the PHY into low-power Suspend mode and disable the PHY clock.
Table 550. USB Endpoint NAK Enable register in device mode (ENDPTNAKEN - address 0x4000 717C) bit
description
Bit
Symbol
Description
Reset
value
Access
3:0
EPRNE
Rx endpoint NAK enable
Each bit enables the corresponding RX NAK bit. If this bit is set and the
corresponding RX endpoint NAK bit is set, the NAK interrupt bit is set.
Bit 3 corresponds to endpoint 3.
...
Bit 1 corresponds to endpoint 1.
Bit 0 corresponds to endpoint 0.
0x00
R/W
15:4
-
Reserved
-
-
19:16
EPTNE
Tx endpoint NAK
Each bit enables the corresponding TX NAK bit. If this bit is set and the
corresponding TX endpoint NAK bit is set, the NAK interrupt bit is set.
Bit 3 corresponds to endpoint 3.
...
Bit 1 corresponds to endpoint 1.
Bit 0 corresponds to endpoint 0.
0x00
R/W
31:20
-
Reserved
-
-