AT43USB325E-AC Atmel, AT43USB325E-AC Datasheet - Page 86

• 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

8.4.4
8.4.4.1
86
AT43USB325
Hub Port Status Register
Hub Port Status Register – HPSTAT1:5
The bits in this register are used by the microcontroller firmware when reporting a port's status
through the Port Status Field, wPortStatus. Bits 3 (POCI) and 5 (PPSTAT) are used by the USB
hardware and are the only two bits that the firmware should set or clear. All other bits should not
be modified by the firmware.
• Bit 7 – Reserved
This bit is reserved in the AT43USB325 and will read as zero.
• Bit 6 – LSP: Low-speed Device Attached
0 = Full-speed device attached to this port
1 = Slow-speed device attached to this port
Set to 0 for Port 1 (full-speed only). Set and cleared by the hardware upon detection of device at
EOF2.
• Bit 5 – PPSTAT: Port Power Status
0 = Port is powered OFF
1 = Port is powered ON
Set to 1 for Port 1. Set and cleared based on present status of port power.
• Bit 4 – PRSTAT: Port Reset Status
0 = Reset signaling not asserted
1 = Reset signaling asserted
Set and cleared by the hardware as a result of initiating a port reset by Port Control Register.
• Bit 3 – POCI: Port Overcurrent Indicator
0 = Power normal
1 = Overcurrent exist on port
Set to 0 for Port 1. Set and cleared by firmware upon detection of an overcurrent or removal of
an overcurrent.
Port3 $1FBA
Port4 $1FBB
Port5 $1FBC
Port1 $1FB8
Port2 $1FB9
Read/Write
Initial Value
Bit
R
7
–
–
–
–
–
0
LSP
LSP
LSP
LSP
LSP
R
6
0
PPSTAT
PPSTAT
PPSTAT
PPSTAT
PPSTAT
R/W
5
0
PRSTAT
PRSTAT
PRSTAT
PRSTAT
PRSTAT
R
4
0
POCI
POCI
POCI
POCI
POCI
R/W
3
0
PSSTAT
PSSTAT
PSSTAT
PSSTAT
PSSTAT
R
2
0
PESTAT
PESTAT
PESTAT
PESTAT
PESTAT
R
1
0
PCSTAT
PCSTAT
PCSTAT
PCSTAT
PCSTAT
R
0
0
3355C–USB–4/05
HPSTAT1
HPSTAT2
HPSTAT3
HPSTAT4
HPSTAT5