Datasheet

Table Of Contents
Section 15 Universal Serial Bus Interface (USB)
REJ09B0140-0900 Rev. 9.00 Page 539 of 846
Sep 16, 2010
H8S/2215 Group
15.3.47 USB Test Register 0 (UTSTR0)
UTSTR0 controls internal or external transceiver output signals. After clearing UCTLR/UIFRST
and UDCRST to 0, setting the PTSTE bit to 1 enable user setting of transceiver output. Table 15.3
shows the relationship between UTSTR0 settings and pin outputs.
Bit Bit Name Initial Value R/W Description
7
PTSTE
0
R/W
Pin Test Enable
Enables the test control of the internal/external
transceiver output signals.
When FADSEL in UCTLR is 0, the test control for the
internal transceiver output pins (USD+ and USD-) and
USPND pin are enabled.
When FADSEL in UCTLR is 1, the test control for the
external transceiver output pins (P17/OE, P15/FSE0,
P13/VPO, and PA3/SUSPND) and USPND pin are
enabled.
6 to 4 All 0 R Reserved
These bits are always read as 0 and cannot be
modified.
3
2
1
0
SUSPEND
OE
FSE0
VPO
0
1
0
0
R/W
R/W
R/W
R/W
Internal/External Transceiver Output Signal
Setting Bits
SUSPEND: Specifies USPND and PA3/SUSPND pin.
OE: Specifies internal transceiver OE signal and
P17/OE pin.
FSE0: Specifies internal transceiver FSE0 signal and
P15/FSE0 pin.
VPO: Specifies internal transceiver VPO signal and
P13/VPO pin.