High Speed Inter-Chip USB 2.0 Hub and Flash Media Controller

Datasheet

8.4.2.3A4h-A5h: Smart Media Device Power Configuration

FET

TYPE

BITS

BIT TYPE

 

DESCRIPTION

 

 

 

 

 

 

0

FET Lo Byte

3:0

Low Nibble

0000b

Disabled

 

SM_PWR_LB

 

 

 

 

1

7:4

High Nibble

 

 

 

 

 

 

 

 

 

 

 

2

FET Hi Byte

3:0

Low Nibble

0000b

Disabled

 

SM_PWR_HB

 

 

0001b

External FET enabled

 

 

 

 

1000b

Internal FET with 100 mA power limit

 

 

 

 

1010b Internal FET with 200 mA power limit

 

 

 

 

 

 

3

 

7:4

High Nibble

0000b

Disabled

 

 

 

 

 

 

8.4.2.4A6h-A7h: Secure Digital Device Power Configuration

FET

TYPE

BITS

BIT TYPE

 

DESCRIPTION

 

 

 

 

 

 

0

FET Lo Byte

3:0

Low Nibble

0000b

Disabled

 

SD_PWR_LB

 

 

 

 

1

7:4

High Nibble

 

 

 

 

 

 

 

 

 

 

 

2

FET Hi Byte

3:0

Low Nibble

0000b

Disabled

 

SD_PWR_HB

 

 

0001b

External FET enabled

 

 

 

 

1000b

Internal FET with 100 mA power limit

 

 

 

 

1010b Internal FET with 200 mA power limit

 

 

 

 

 

 

3

 

7:4

High Nibble

0000b

Disabled

 

 

 

 

 

 

8.4.2.5A8h: LED Blink Interval

BYTE

NAME

DESCRIPTION

 

 

 

0

LED_BLK_INT

The blink rate is programmable in 50 ms intervals. The high bit (7) indicates

 

 

an idle state:

 

 

‘0’ - Off

 

 

‘1’ - On

 

 

The remaining bits (6:0) are used to determine the blink interval up to a max

 

 

of 128 x 50 ms.

 

 

 

8.4.2.6A9h: LED Blink Duration

BYTE

NAME

DESCRIPTION

 

 

 

1

LED_BLK_DUR

LED Blink After Access. This byte is used to designate the number of

 

 

seconds that the GPIO1 LED will continue to blink after a drive access.

 

 

Setting this byte to "05" will cause the GPIO 1 LED to blink for 5 seconds

 

 

after a drive access.

 

 

 

Revision 1.0 (06-01-09)

38

SMSC USB4640/USB4640i

DATASHEET