Datasheet

Section 22 USB Function Module (USB)
Rev. 2.00 Aug. 20, 2008 Page 858 of 1198
REJ09B0403-0200
22.3.26 Transceiver Test Register 0 (TRNTREG0)
TRNTREG0 controls the built-in transceiver output signals. Setting the PTSTE bit to 1 specifies
the transceiver output signals (USD+ and USD-) arbitrarily. Table 22.4 shows the relationship
between TRNTREG0 setting and pin output.
Bit Bit Name
Initial
Value
R/W Description
7 PTSTE 0 R/W Pin Test Enable
Enables the test control for the built-in transceiver
output pins (USD+ and USD-).
6 to 4  All 0 R
Reserved
These bits are always read as 0. The initial value
should not be changed.
3
2
1
0
SUSPEND
txenl
txse0
txdata
0
0
0
0
R/W
R/W
R/W
R/W
Built-In Transceiver Output Signal Setting
SUSPEND: Sets the (SUSPEND) signal of the built-in
transceiver.
txenl: Sets the output enable (txenl) signal of the
built-in transceiver.
txse0: Sets the Signal-ended 0 (txse0) signal of
the built-in transceiver.
txdata: Sets the (txdata) signal of the built-in
transceiver.