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High Speed Inter-Chip USB 2.0 Hub and Flash Media Controller
Datasheet
SMSC USB4640/USB4640i 25 Revision 1.0 (06-01-09)
DATASHEET
Chapter 7 Pin Reset States
Figure 7.1 Pin Reset States
7.1 Pin Reset States
Table 7.1 Legend for Pin Reset States Table
SYMBOL DESCRIPTION
0 Output driven low
1 Output driven high
IP Input enabled
PU Hardware enables pull-up
PD Hardware enables pull-down
none Hardware disables pad
-- Hardware disables function
Z Hardware disables pad. Both output
driver and input buffers are disabled.
Table 7.2 USB4640/USB4640i Reset States Table
RESET STATE
PIN PIN NAME FUNCTION
INPUT/
OUTPUT
PU/
PD
1 USBDN_DM2 USBDN_DM2 IP PD
2 USBDN_DP2 USBDN_DP2 IP PD
3 USBDN_DM3 USBDN_DM3 IP PD
4 USBDN_DP3 USBDN_DP3 IP PD
6 PRTCTL2 PRTCTL 0 --
7 PRTCTL3 PRTCTL 0 --
Voltage
Signal
(v)
Time
(t)
RESET
RESET
Hardware
Initialization
Firmware
Operational
V
DD33
V
SS