SMSC USB4640i Manual De Usuario
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