isp1760 NXP Semiconductors, isp1760 Datasheet - Page 30

• Manufacturer Part Number: isp1760
• Description: Hi-speed Universal Serial Bus Host Controller For Embedded Applications
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 13257
Product data sheet
Bit
Symbol
Reset
Access
Bit
Symbol
Reset
Access
Bit
Symbol
Reset
Access
8.2.1 USBCMD register (R/W: 0020h)
8.2 EHCI operational registers
23
15
R
R
R
0
0
7
1
Table 11:
[1]
The USB Command (USBCMD) register indicates the command to be executed by the
serial Host Controller. Writing to this register causes a command to be executed.
shows the USBCMD register bit allocation.
Bit
31 to 16
15 to 8
7 to 4
3
2
1
0
For details on register bit description, refer to Enhanced Host Controller Interface Specification for Universal
Serial Bus Rev. 1.0 .
22
14
R
R
R
0
0
6
0
Symbol
-
EECP[7:0] EHCI Extended Capabilities Pointer: Default = implementation
IST[3:0]
-
ASPC
PFLF
64AC
HCCPARAMS register: bit description
IST[3:0]
21
13
R
R
R
0
0
5
0
Rev. 01 — 8 November 2004
Description
reserved; write logic 0
dependent. This optional field indicates the existence of a capabilities list.
Isochronous Scheduling Threshold: Default = implementation
dependent. This field indicates, relative to the current position of the
executing Host Controller, where software can reliably update the
isochronous schedule.
reserved; write logic 0
Asynchronous Schedule Park Capability: Default = implementation
dependent. If this bit is set to logic 1, the Host Controller supports the park
feature for high-speed queue heads in the Asynchronous Schedule.
Programmable Frame List Flag: Default = implementation dependent. If
this bit is cleared, the system software must use a frame list length of
1024 elements with this Host Controller.
If PFLF is set, the system software can specify and use a smaller frame
list and configure the host through the FLS field of the USBCMD register.
64-bit Addressing Capability: This field contains the addressing range
capability.
20
12
R
R
R
0
0
4
0
[1]
EECP[7:0]
reserved
reserved
19
11
R
R
R
0
0
3
0
Embedded Hi-Speed USB host controller
ASPC
18
10
R
R
R
0
0
2
1
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
PFLF
17
R
R
R
0
9
0
1
1
ISP1760
Table 12
64AC
30 of 105
16
R
R
R
0
8
0
0
0