C541U_99 Datasheet, PDF (126/192 Pages) Siemens Semiconductor Group – 8-BIT CMOS MICROCONTROLLER

On-Chip Peripheral Components
C541U
USB Module Power Down Register USBPWD (Address E6H)
Bit No. MSB
7
E6H
0
r
6
5
4
3
2
0 SUSPIE DADDIE SUSP DADD
r
rw
rw
r
r
Reset Value : 00H
LSB
1
0
TPWD RPWD USBPWD
rw
rw
Bit
SUSPIE
DADDIE
SUSP
DADD
TPWD
RPWD
0
Function
Suspend Interrupt Enable/Disable bit
0: Suspend interrupt generation is disabled.
1: Suspend interrupt generation is enabled.
Device Attach/Detach Interrupt Enable/Disable bit
0: Interrupt generation upon DADD/P3.1 pin status is disabled.
1: Interrupt generation upon DADD/P3.1 pin status is enabled.
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.
Device attached or detached
Bit DADD monitors the state of the associated I/O pin DADD (see also TYPE bit
field of USBDCR).
Transmitter Power Down
0: Transmitter is active.
1: Transmitter is in power down state.
Receiver Power Down
0: Receiver is active.
1: Receiver is in power down state.
Reserved for future use. For compatiblity, these bits have to be ignored in all read
accesses and written with zero in all write accesses.
Semiconductor Group
6-81
1999-04-01