Siemens C541U User Manual page 146

Special Function Register GEPIR (Address D6
Bit No. MSB
7
D6 H DRVI
rw
Bit
DRVI
Special Function Register USBPWD ( Address E6 H )
Bit No. MSB
7
0
E6 H
r
Bit Function
SUSP Suspend mode
This bit is set when the USB has been idle for more than 3 ms. It will remain set
until there is a non-idle state on the USB cable.
DADD Device attached or detached
Bit DADD monitors the state of the associated I/O pin DADD (see also TYPE bit
field of USBDCR).
Semiconductor Group
6 5 4
0 0 EPI4
r r r
Function
Device request value interrupt
Bit DRVI is set each time the host sends device request that contains one
or more of the following :
- Configuration Value (through SET_CONFIGURATION device request)
- Alternate Setting (through SET_INTERFACE device request)
- Interface (through SET_INTERFACE device request).
This flag can only be cleared by writing '0' to the bit. Writing '1' to the bit will
be ignored.
6 5 4
0 SUSPIE DADDIE
r rw rw
)
H
3 2
EPI3 EPI2 EPI1
r r
3 2
SUSP DADD
r r
7-13
Interrupt System
ResetValue : 00 H
LSB
1 0
EPI0 GEPIR
r r
Reset Value : 00 H
LSB
1 0
USBPWD
TPWD RPWD
rw rw
1997-10-01
C541U