
M
±15kV ESD-Protected USB Transceiver
in UCSP
______________________________________________________________________________________
11
OE
= 0 (TRANSMIT)
INPUT
OUTPUT
D-
0
1
0
1
VP
0
0
1
1
VM
0
1
0
1
D+
0
0
1
1
RCV
RCV*
0
1
X
RESULT
SE0
Logic 0
Logic 1
Undefined
Table 3b. Truth Table, Transmit (MODE = 1)
OE
= 1 (RECEIVE)
INPUT
OUTPUT
VM
0
1
0
1
D+
0
0
1
1
D-
0
1
0
1
VP
0
0
1
1
RCV
RCV*
0
1
X
RESULT
SE0
Logic 0
Logic 1
Undefined
Table 3c. Truth Table, Receive
SUSP
0
0
0
0
1
1
ENUMERATE
0
0
1
1
0
1
OE
0
1
0
1
0 or 1
0 or 1
D+/D-
Driving
High-Z
Driving
High-Z
High-Z
High-Z
RCV
Active
Active
Active
Active
0
0
VP/VM
High-Z
Active
High-Z
Active
Active
Active
FUNCTION
Normal driving
Normal receiving, R
PULLUP
disconnected
Normal driving
Normal receiving, R
PULLUP
connected
Suspend mode, R
PULLUP
disconnected
Suspend mode, R
PULLUP
connected
Table 3d. Function Select
OE
= 0 (TRANSMIT)
INPUT
OUTPUT
D-
1
0
0
0
VP
0
0
1
1
VM
0
1
0
1
D+
0
0
1
0
RCV
0
RCV*
1
X
RESULT
Logic 0
SE0
Logic 1
SE0
Table 3a. Truth Table, Transmit (MODE = 0)
*
RCV denotes the signal level on output RCV just before SE0 state occurs. This level is stable during the SE0 period.
*
RCV denotes the signal level on output RCV just before SE0 state occurs. This level is stable during the SE0 period.
*
RCV denotes the signal level on output RCV just before SE0 state occurs. This level is stable during the SE0 period.