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APPENDIX
38K2 Group
b0
b7
0
3.4 List of registers
0 0
DP2 interrupt source register (DP2REQ) [address 002B16]
Bit symbol
PTDIS2
PTCON2
PTERR2
PTRSM2
PTCHG2
b7:b5
Bit name
Downstream port 2 disconnect
detection interrupt bit
Function
0: No interrupt request issued
1: Interrupt request issued
This bit is set to “1” when detecting a bus-disconnect
state (2.5 µs or more of SE0) on a downstream port 2 in
DSCONN2 = “1”.
“0” can be set by software, but “1” cannot be set.
Downstream port 2 connect
0: No interrupt request issued
detection interrupt bit
1: Interrupt request issued
This bit is set to “1” when detecting a bus-connect
state (2.5 µs or more of J- or K- state) on a downstream
port 2 in DSCONN2 = “0”.
“0” can be set by software, but “1” cannot be set.
Downstream port 2 port error
0: No interrupt request issued
interrupt bit
1: Interrupt request issued
This bit is set to “1” when an error occurs on a
downstream port 2.
“0” can be set by software, but “1” cannot be set.
Downstream port 2 resume
0: No interrupt request issued
interrupt bit
1: Interrupt request issued
This bit is set to “1” when detecting a resume signal
on a downstream port 2 in the condition of HUB
suspended or port suspended state.
“0” can be set by software, but “1” cannot be set.
Downstream port 2 bus-change 0: No interrupt request issued
detection interrupt bit
1: Interrupt request issued
This bit is set to “1” when detecting a bus-change of a
downstream port 2 in the condition of HUB suspended
state. It is also “1” in the internal clock halted.
“0” can be set by software, but “1” cannot be set.
Not used
Write “0” when writing.
“0” is read when reading.
At reset R W
H/W S/W
0
– O O
0
–
O O
0
–
O O
0
–
O O
0
–
O O
–
–
O O
–: State remaining
Fig. 3.4.60 Structure of DP2 interrupt source register
Rev.2.00 Oct 15, 2006
REJ09B0338-0200
page 63 of 99