at43usb320a ATMEL Corporation, at43usb320a Datasheet - Page 87

• Manufacturer Part Number: at43usb320a
• Description: Full-speed Usb Microcontroller With An Embedded Hub
• Manufacturer: ATMEL Corporation

Hub General Registers
1443E–USB–4/04
Global State Register – GLB_STATE
• Bit 7...5 – Reserved Bits
These bits are reserved in the AT43USB320A and will read as zeros.
• Bit 4 – SUSP FLG: Suspend Flag
This bit is set to 1 while the USB hardware is in the suspended state. This bit is a firmware
read only bit. It is set and cleared by the USB hardware.
• Bit 3 – RESUME FLGL Resume Flag
When the USB hardware receives a resume signal from the upstream device it sets this bit.
This bit will stay set until the USB hardware completes the downstream resume signaling. This
bit is a firmware read only bit. It is set and cleared by the USB hardware.
• Bit 2 – RMWUPE: Remote Wakeup Enable
This bit is set if the host enables the hub's remote wakeup feature.
• Bit 1 – CONFG: Configured
This bit is set by firmware after a valid SET_CONFIGURATION request is received. It is
cleared by a reset or by a SET_CONFIGURATION with a value of 0.
• Bit 0 – HADD EN: Hub Address Enabled
This bit is set by firmware after the status phase of a SET_ADDRESS request transaction so
the hub will use the new address starting at the next transaction.
Read/Write
Initial Value
$1FFB
Bit
R
7
–
0
6
–
R
0
R
5
–
0
SUSP FLG
R
4
0
RESUME FLG
R
3
0
RMWUPE
R/W
2
0
AT43USB320A
CONFG
R/W
1
0
HADD EN
R/W
0
0
GLB_STATE
87