AT43USB325E-AC Atmel, AT43USB325E-AC Datasheet - Page 74

• 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

8.3.4
8.3.5
74
AT43USB325
Hub Endpoint 0 Data Register – HDR0
Function Endpoint 0..3 Data Register – FDR0..3
This register is used to read data from or to write data to the Hub Endpoint 0 FIFO.
• Bit 7..0 – FDAT7..0: FIFO Data
Hub endpoint 1 has a single byte data register instead of a FIFO. This data register contains the
hub and port status change bitmap. This data register is automatically updated by the USB hard-
ware and is not accessible by the firmware. The bits in this register when read by the host will
be:
• Bit 7,6 – Reserved
These bits are reserved in the AT43USB325 and will read as zero.
• Bit 5 – P5 SC: Port 5 Status Change
• Bit 4 – P4 SC: Port 4 Status Change
• Bit 3 – P3 SC: Port 3 Status Change
• Bit 2 – P2 SC: Port 2 Status Change
• Bit 1 – P1 SC: Port 1 Status Change
• Bit 0 – H SC: Hub Status Change
Read/Write
Initial Value
Initial Value
Read/Write
$1FD7
$1FD5
$1FD4
$1FD3
$1FD2
Bit
Bit
$
DATA7
DATA7
DATA7
DATA7
DATA7
R/W
R/W
7
0
7
–
0
DATA6
DATA6
DATA6
DATA6
DATA6
R/W
R/W
6
0
6
–
0
DATA5
DATA5
DATA5
DATA5
DATA5
R/W
P5 CS
R/W
5
0
5
0
DATA4
DATA4
DATA4
DATA4
DATA4
R/W
P4 CS
R/W
4
0
4
0
DATA3
DATA3
DATA3
DATA3
DATA3
R/W
P3 SC
3
0
R/W
3
0
DATA2
DATA2
DATA2
DATA2
DATA2
R/W
P2 SC
2
0
R/W
2
0
DATA1
DATA1
DATA1
DATA1
DATA1
R/W
P1 SC
1
0
R/W
1
0
DATA0
DATA0
DATA0
DATA0
DATA0
R/W
0
0
H SC
R/W
3355C–USB–4/05
0
0
HDR0
FDR0
FDR1
FDR2
FDR3
HDR1