38K2 Datasheet, PDF (60/151 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

38K2 Group
HUB Interrupt Function
The HUB function control circuit has one interrupt request consist-
ing of 10 interrupt sources each of which can be determined
through the interrupt source register. Table 8 shows the HUB inter-
rupt sources.
Table 8 HUB interrupt sources
Interrupt request bit
(IREQ2: Address 003D16)
USB HUB
HUB interrupt bit
(HUBIREQ: Address 002916)
DP1
DP2
Interrupt source
At HUB down-port 1 state change detected:
•Disconnected state detected
•Connected state detected
•Port error state detected
•Resume signal detected
•Bus state change detected
At HUB down-port 2 state change detected:
•Disconnected state detected
•Connected state detected
•Port error state detected
•Resume signal detected
•Bus state change detected
[DPXREG1]
[DP1REQ]
PTDIS1
PTCON1
PTERR1
PTRSM1
PTCHG1
[DP2REQ]
PTDIS2
PTCON2
PTERR2
PTRSM2
PTCHG2
[HUBIREQ]
[HUBICON]
DP1E
DP1
DP2E
DP2
Fig. 91 USB HUB interrupt control
Rev.3.00 Oct 15, 2006 page 60 of 147
REJ03B0193-0300
USB HUB
interrupt request