UM10503
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User manual
Rev. 1.3 — 6 July 2012
611 of 1269
NXP Semiconductors
UM10503
Chapter 24: LPC43xx USB1 Host/Device controller
24.6.14.2 Host mode
This register is not used in host mode.
24.6.15 Port Status and Control register (PORTSC1)
24.6.15.1 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 480. 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
-
-
Table 481. Port Status and Control register in device mode (PORTSC1_D - address 0x4000 7184) bit description
Bit
Symbol
Value
Description
Reset
value
Access
0
CCS
Current connect status
0
RO
0
Device not attached
A zero indicates that the device did not attach successfully or was forcibly
disconnected by the software writing a zero to the Run bit in the USBCMD
register. It does not state the device being disconnected or suspended.
1
Device attached.
A one indicates that the device successfully attached and is operating in
either high-speed mode or full-speed mode as indicated by the High Speed
Port bit in this register.
1
CSC
-
Not used in device mode
0
-
2
PE
1
Port enable.
This bit is always 1. The device port is always enabled.
1
RO