USB2660 Standard Microsystems Corp., USB2660 Datasheet - Page 52

• Manufacturer Part Number: USB2660
• Description: Ultra Fast Usb 2.0 Hub And Multi-format Flash Media Controller With Dual Sd Interfaces
• Manufacturer: Standard Microsystems Corp.

Revision 1.0 (06-09-09)
8.4.5.6
8.4.5.7
8.4.5.8
8.4.5.9
8.4.5.10
BYTE
BYTE
BYTE
21:0
BIT
6:0
7:0
4:0
123h-129h: Device 4 Identifier String
130h-145h: Not Applicable
146h: Dynamic Number of Extended LUNs
147h-14Bh: Device to LUN Mapping
14Ch-14Dh: Second Secure Digital Device Power Configuration
The device has two internal FETs which can be utilized for card power. For information about the other
internal FET, please see
page
configuration.
1. A card can be powered by an external FET or by an internal FET.
2. The power limit can be set to 100 mA or 200 mA (Default) for the internal FET.
Each media uses two bytes to store its device power configuration. Bit 3 selects between internal or
external card power FET options. For internal FET card power control, bits 0 through 2 are used to
set the power limit. The “Device Power Configuration” bits are ignored unless the “Enable Device
Power Configuration” bit is set. See
page
DEV_LUN_MAP
DEV4_ID_STR
Not Applicable
DYN_NUM_
37.
39. The settings are stored in NVSTORE. This section describes the default internal
EXT_LUN
NAME
NAME
NAME
NAME
Ultra Fast USB 2.0 Hub and Multi-Format Flash Media Controller with Dual SD Interfaces
This ID string is associated with the second Secure Digital / MultiMediaCard
“SD/MMC2” device.
Not applicable.
These bytes are used to specify the number of LUNs the device exposes to
the host. These bytes are also used for icon sharing by assigning more than
one LUN to a single icon. This is used in applications where the device
utilizes a combo socket and the OEM wishes to have only a single icon
displayed for one or more interfaces.
If this field is set to "FF", the program assumes that you are using the default
value and icons will be configured per the default configuration.
These registers map a device controller (SD/MMC, SM
to a Logical Unit Number (LUN). The device reports the mapped LUNs to
the USB host in the USB descriptor during enumeration. The icon installer
associates custom icons with the LUNs specified in these fields.
Setting a register to "FF" indicates that the device is not mapped. Setting all
of the DEV_LUN_MAP registers for all devices to "FF" forces the use of the
default mapping configuration. Not all configurations are valid. Valid
configurations depend on the hardware, packaging, and OEM board layout.
The number of unique LUNs mapped must match the value in the
8.4.3.7, "D3h: Dynamic Number of LUNs," on page
Section 8.4.2.3, "A4h-A5h: Smart Media Device Power Configuration," on
DATASHEET
Section 8.4.1.19, "9Ch-9Fh: Attribute Byte Descriptions," on
52
DESCRIPTION
DESCRIPTION
DESCRIPTION
DESCRIPTION
41.
SMSC USB2660/USB2660i
(Note
8.2), and MS)
Section
Datasheet