EZ-USB Datasheet, PDF (327/334 Pages) Cypress Semiconductor – The EZ-USB USB Integrated Circuit

Table C-15. EICON Register - SFR D8h
Bit
Function
EICON.7
EICON.6
EICON.5
EICON.4
EICON.3
EICON.2-0
SMOD1 - Serial Port 1 baud rate doubler enable. When
SMOD1 = 1 the baud rate for Serial Port is doubled.
Reserved. Read as 1.
ERESI - Enable resume interrupt. ERESI = 0 disables
resume interrupt (RESI). ERESI = 1 enables interrupts
generated by the resume event.
RESI - Wakeup interrupt flag. EICON.4 = 1 indicates a
negative transition was detected at the WAKEUP# pin, or
that USB has activity resumed from the suspended state.
EICON.4 = 1 must be cleared by software before exiting the
interrupt service routine, otherwise the interrupt occurs
again. Setting EICON.4=1 in software generates a wakeup
interrupt, if enabled.
INT6 - External interrupt 6. When INT6 = 1, the INT6 pin
has detected a low to high transition. INT6 will remain active
until cleared by writing a 0 to this bit. Setting this bit in
software generates an INT6 interrupt in enabled.
Reserved. Read as 0.
EZ-USB TRM v1.9
Appendix C: 8051 Hardware Description
C - 31