38K2 Datasheet, PDF (62/151 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

38K2 Group
HUB Related Registers
The HUB related registers are shown below.
b7
0 00 00
b0
HUB interrupt source enable register (HUBICON) [address 002816]
Bit symbol
Bit name
Function
DP1E
DP2E
b6:b2
HRWUE
HUB downstream port 1 interrupt 0 : Interrupt disabled
enable bit
1 : Interrupt enabled
HUB downstream port 2 interrupt 0 : Interrupt disabled
enable bit
1 : Interrupt enabled
Not used
Write “0” when writing.
“0” is read when reading.
HUB upstream port remote- 0 : Disabled
wakeup output enable bit
1 : Enabled
Fig. 93 Structure of HUB interrupt source enable register
At reset _{R W}
H/W S/W
0 – OO
0 – OO
– – OO
0 – OO
–: State remaining
b7
0 000 0
b0
HUB interrupt source register (HUBIREQ) [address 002916]
Bit symbol
Bit name
DP1
HUB downstream port 1
interrupt bit
DP2
HUB downstream port 1
interrupt bit
b6:b2
HRWU
Not used
HUB upstream port remote
-wakeup output enable bit
Function
At reset _{R W}
H/W S/W
This bit is set to “1” when any one of DP1 interrupt 0 – _{O ✕}
source register’s bits at least is set to “1”.
This bit is cleared to “0” by clearing DP1 interrupt
source register to “0016”.
Writing to this bit causes no state change.
This bit is set to “1” when any one of DP2 interrupt 0 – _{O ✕}
source register’s bits at least is set to “1”.
This bit is cleared to “0” by clearing DP2 interrupt
source register to “0016”.
Writing to this bit causes no state change.
Write “0” when writing.
– – _OO
“0” is read when reading.
0 : Remote-wakeup being not output
0 – _OO
1 : Remote-wakeup being output
This bit change is not for a interrupt source.
When detecting 2.5 µs or more of K-signal on a
downstream port in Hub-suspended state, K-signal is
output on from a upstream port and this bit is
simultaneously set to “1”.
“0” can be set by software, but “1” cannot be set.
–: State remaining
Fig. 94 Structure of HUB interrupt source register
Rev.3.00 Oct 15, 2006 page 62 of 147
REJ03B0193-0300