SMSC USB464, USB4640i 8.4.2.3A4h-A5h:Smart Media Device Power Configuration, 8.4.2.4A6h-A7h:Secure Digital Device Power Configuration, 8.4.2.5A8h: LED Blink Interval

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