USB2660 Standard Microsystems Corp., USB2660 Datasheet - Page 20

• 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)
SPI_SPD_SEL
SPI_CLK /
SYMBOL
SPI_DO /
GPIO4 /
GPIO5 /
GPIO1 /
GPIO2 /
SPI_DI
SDA /
LED /
RXD
SCL
TXD
64-PIN
QFN
50
51
52
53
44
Table 6.1 USB2660/USB2660i Pin Descriptions (continued)
(Table
BUFFER
I/O12PD
TYPE
I/O12
I/O12
I/O12
I/O6
I/O6
I/O6
I/O6
6.2)
Ultra Fast USB 2.0 Hub and Multi-Format Flash Media Controller with Dual SD Interfaces
This pin may be used either as input, edge sensitive interrupt input, or
This pin may be used either as input, edge sensitive interrupt input, or
This is the data in to the controller from the ROM. This pin has a weak
General Purpose I/O
This pin may be used either as input, edge sensitive interrupt input, or
DESCRIPTION
This is the SPI clock out to the serial ROM. See
BOOT Sequence"
drive this pin low.
output. Custom firmware is required to activate this function.
When configured, this is the I
This is the data out for the SPI port. See
Sequence"
output. Custom firmware is required to activate this function.
This pin is the data pin when the device is connected to the optional
I
This pin is used to select the speed of the SPI interface. During
nRESET assertion, this pin will be tri-stated with the weak pull-down
resistor enabled. When nRESET is negated, the value on the pin will
be internally latched, and the pin will revert to SPI_DO functionality, the
internal pull-down will be disabled.
‘0’ = 30 MHz (No external resistor should be applied.)
‘1’ = 60 MHz (A 10 K external pull-up resistor must be applied.)
If the latched value is '1', then the pin is tri-stated when the chip is in
the suspend state.
If the latched value is '0', then the pin is driven low during a suspend
state.
internal pull-down applied at all times to prevent floating.
This pin may be used either as input, edge sensitive interrupt input, or
output. Custom firmware is required to activate this function.
GPIO1 can be used as an LED output.
This signal can be configured as the TXD output of the internal UART.
Custom firmware is required to activate this function.
output. Custom firmware is required to activate this function.
This signal can be configured as input to the RXD of the internal UART.
Custom firmware is required to activate this function.
2
C EEPROM.
DATASHEET
MISC
for diagram and usage instructions.
20
for diagram and usage instructions. During reset,
2
C EEPROM clock pin.
Section 6.4, "ROM BOOT
SMSC USB2660/USB2660i
Section 6.4, "ROM
Datasheet