AT43USB325E-AC Atmel, AT43USB325E-AC Datasheet - Page 82

• Manufacturer Part Number: AT43USB325E-AC
• Description: IC USB KEYBOARD CTRLR HUB 64LQFP
• Manufacturer: Atmel
• Series: AVR®r

Specifications of AT43USB325E-AC

• Applications: Keyboard Controller
• Core Processor: AVR
• Program Memory Type: SRAM (16 kB)
• Controller Series: AT43USB
• Ram Size: 512 x 8
• Interface: SPI, 3-Wire Serial
• Number Of I /o: 42
• Voltage - Supply: 4.4 V ~ 5.25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

8.4.1
8.4.1.1
82
AT43USB325
Hub General Registers
Global State Register – GLB_STATE
• Bit 7 – Reserved Bit
This bit is reserved in the AT43USB325 and will read as zero.
• Bit 6 – KB INT EN: Keyboard Interrupt Enable
The firmware must set this bit to a 1 before entering suspend to allow remote wakeup when any
key depression is detected in the suspended state.
• Bit 5 – Reserved Bit
This bit is reserved in the AT43USB325 and will read as zero.
• 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.
Initial Value
Read/Write
$1FFB
Bit
R
7
–
0
KB INT EN
R
6
0
R
5
–
0
SUSP FLG
R
4
0
RESUME FLG
3
R
0
RMWUPE
R/W
2
0
CONFG
R/W
1
0
HADD EN
R/W
0
0
3355C–USB–4/05
GLB_STATE