EVB-USB4640 SMSC, EVB-USB4640 Datasheet - Page 37

• Manufacturer Part Number: EVB-USB4640
• Description: EVALUATION BOARD FOR USB4640
• Manufacturer: SMSC

Specifications of EVB-USB4640

• Main Purpose: Interface, USB 2.0 Hub
• Embedded: *
• Utilized Ic / Part: USB4640
• Primary Attributes: *
• Secondary Attributes: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 638-1107

High Speed Inter-Chip (HSIC) USB 2.0 Hub and Flash Media Controller
Datasheet
SMSC USB4640/USB4640i
8.4.2
8.4.2.1
8.4.2.2
BYTE
FET
BYTE
2
3
0
1
2
3
1:0
MS_PWR_HB
MS_PWR_LB
FET Lo Byte
FET Hi Byte
ATT_LHB
ATT_HB
A0h-A7h: Device Power Configuration
The USB4640/USB4640i has one internal FET which can be utilized for card power. This section
describes the default internal configuration. The settings are stored in NVSTORE and provide the
following features:
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
A0h-A1h: Memory Stick Device Power Configuration
A2h-A3h: Not Applicable
NAME
BYTE
TYPE
Not Applicable
36.
NAME
BIT
7:3
6:0
1
2
7
0
BITS
3:0
3:0
7:4
7:4
Not applicable.
Attach on Card Insert / Detach on Card Removal
‘1’ - Attach on Insert is enabled.
‘0’ (default) - Attach on Insert is disabled.
Always reads ‘0’.
Enable Device Power Configuration
‘1’ - Custom Device Power Configuration stored in the NVSTORE is used.
‘0’ (default) - Default Device Power Configuration is used.
Always reads ‘0’.
Always reads ‘0’.
xD Player Mode
Low Nibble
High Nibble
Low Nibble
High Nibble
BIT TYPE
DATASHEET
Section 8.4.1.19, "9Ch-9Fh: Attribute Byte Descriptions," on
37
0000b Disabled
0000b Disabled
0001b External FET enabled
1000b Internal FET with 100 mA power limit
1010b Internal FET with 200 mA power limit
0000b Disabled
DESCRIPTION
DESCRIPTION
DESCRIPTION
Revision 1.0 (06-09-09)