USB2640I Standard Microsystems Corp., USB2640I Datasheet - Page 50

• Manufacturer Part Number: USB2640I
• Description: Industrial Temperature Usb 2.0 Flash Media Controller And Usb Hub Combo
• Manufacturer: Standard Microsystems Corp.

Chapter 8 Pin Reset States
Revision 2.0 (10-03-08)
8.1
1
2
PIN
USBDN_DM2
USBDN_DP2
Pin Reset States
Y
0
1
--
Z
PU
PD
HW
(FW)
VDD
none
SYMBOL
PIN NAME
V
V
Signal (v)
Voltage
DD33
SS
Hardware enables function
Ouput low
Output high
Hardware disables function
Hardware disables output driver (high impedance)
Hardware enables pullup
Hardware enables pulldown
Hardware controls function, but state is protocol dependent
Firmware controls function through registers
Hardware supplies power through pin, applicable only to
CARD_PWR pins
Hardware disables pad
Table 8.1 Legend for Pin Reset States Table
Table 8.2 USB2640i Pin Reset States
RESET
Figure 8.1 Pin Reset States
Industrial Temperature USB 2.0 Flash Media Controller and USB Hub Combo
DATASHEET
Initialization
Hardware
DESCRIPTION
50
USBDN_DM2
USBDN_DP2
FUNCTION
Operational
Firmware
RESET STATE
0
0
Time
RESET
(t)
OUTPUT
SMSC USB2640i/USB2641i
PD
PD
PU/
PD
--
--
INPUT