Datasheet

Section 14 Universal Serial Bus (USB)
Rev.7.00 Dec. 24, 2008 Page 490 of 698
REJ09B0074-0700
Table 14.2 Relationship between UTSTR0 Setting and Pin Output
Register Setting Pin Output Pin Input Register Setting Pin Output
UCTLR/
TMOWE PTSTE SUSPEND
USPND/
TMOW VBUS PTSTE OE FSE0 VPO USD+ USD-
1 × × — 0 × × × × Hi-Z Hi-Z
0 0 × — 1 0 × × × — —
0 1 0 0 1 1 0 0 0 0 1
0 1 1 1 1 1 0 0 1 1 0
1 1 0 1 × 0 0
1 1 1 × × Hi-Z Hi-Z
Legend:
×: Don’t care
—: Cannot be controlled. Indicates state in normal operation according to the USB operation and
port settings.
14.3.28 USB Test Register 1 (UTSTR1)
UTSTR1 allows the USB control pin and on-chip transceiver input signals to be monitored. Table
14.3 shows the relationship between pin input and UTSTR1 monitoring value.
Bit Bit Name Initial Value R/W Description
7
6
VBUS
UBPM
—*
—*
R
R
On-Chip Transceiver Input Signal Monitor
VBUS: Monitors the VBUS pin.
UBPM: Monitors the UBPM pin.
5 to 3 — All 0 R Reserved
These bits are always read as 0 and cannot be
modified.
2
1
0
RCV
VP
VM
—*
—*
—*
R
R
R
On-Chip Transceiver Input Signal Monitor
RCV: Monitors the differential input level (RCV)
signal of the on-chip transceiver.
VP: Monitors the USD+ (VP) signal of the on-chip
transceiver.
VM: Monitors the USD- (VM) signal of the on-chip
transceiver.
Note: * Determined by the state of pins. VBUS, UBPM, USD+, USD-