ISP1362
Single-chip USB OTG controller
Philips Semiconductors
16.1.2 DcAddress register (R/W: B7H/B6H)
This command is used to set the USB assigned address in the DcAddress register
and enable the USB device. The DcAddress register bit allocation is shown in
Table 110.
A USB bus reset sets the device address to 00H (internally) and enables the device.
The value of the DcAddress register (accessible by the microprocessor) is not altered
by the bus reset. In response to the standard USB request Set Address, the firmware
must issue a Write Device Address command, followed by sending an empty packet
to the host. The new device address is activated when the host acknowledges the
empty packet.
Code (Hex): B6/B7 — write or read DcAddress register
Transaction — write or read 1 byte (code or data)
Table 110: DcAddress register: bit allocation
Bit
7
DEVEN
0
6
5
4
3
2
1
0
Symbol
Reset
Access
DEVADR[6:0]
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Table 111: DcAddress register: bit description
Bit
7
Symbol
Description
DEVEN
Logic 1 enables the device.
6 to 0
DEVADR[6:0] This field specifies the USB device address.
16.1.3 DcMode register (R/W: B9H/B8H)
This command is used to access the DcMode register, which consists of 1 byte (bit
allocation: see Table 112). In the 16-bit bus mode, the upper byte is ignored.
The DcMode register controls the DMA bus width, the resume and suspend modes,
interrupt activity, and SoftConnect operation. It can be used to enable the debug
mode, in which all errors and Not Acknowledge (NAK) conditions will generate an
interrupt.
Code (Hex): B8/B9 — write or read DcMode register
Transaction — write or read 1 byte (code or data)
Table 112: DcMode register: bit allocation
Bit
7
6
5
GOSUSP
0
4
reserved
0
3
INTENA
0[1]
2
DBGMOD
0[1]
1
reserved
0[1]
0
SOFTCT
0[1]
Symbol
Reset
Access
reserved
1[1]
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
[1] Unchanged by a bus reset.
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© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data
Rev. 03 — 06 January 2004
114 of 150
NXP [ NXP ]
