H8SX1668R Datasheet, PDF (1030/1504 Pages) Renesas Technology Corp – Renesas 32-Bit CISC Microcomputer H8SX Family / H8SX/1600 Series

Section 20 USB Function Module (USB)
20.3.27 Transceiver Test Register 1 (TRNTREG1)
TRNTREG1 is a test register that can monitor the on-chip transceiver input signal.
Setting bits PTSTE and txenl in TRNTREG0 to 1 enables monitoring the on-chip transceiver input
signal. Table 20.5 shows the relationship between pin input and TRNTREG1 monitoring value.
Bit
7
6
5
4
3
2
1
0
Bit Name





xver_data
dpls
dmns
Initial Value
0
0
0
0
0
*
*
*
R/W
R
R
R
R
R
R
R
R
Initial
Bit
Bit Name Value R/W Description
7 to 3 
All 0 R
Reserved
These bits are always read as 0. The write value should
always be 0.
2
xver_data *
R
On-Chip Transceiver Input Signal Monitor
1
dpls
*
R
xver_data: Monitors the differential input level
0
dmns
*
R
(xver_data) signal of the on-chip
transceiver.
dpls:
Monitors the USD+ (dpls) signal of the on-
chip transceiver.
dmns:
Monitors the USD- (dmns) signal of the on-
chip transceiver.
Note: * Determined by the state of pins, VBUS, USD+, and USD-
Rev. 2.00 Sep. 24, 2008 Page 998 of 1468
REJ09B0412-0200