AT43USB325E-AC Atmel, AT43USB325E-AC Datasheet - Page 36

• 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

4.13.5
36
AT43USB325
Suspend/Resume Register – SPRSR
• Bit 7 – INTD: External Interrupt D
The INTD bit is set when an external interrupt at the INTD pin is detected.
• Bit 6 – INTC: External Interrupt C
The INTC bit is set when an external interrupt at the INTC pin is detected.
• Bit 5 – INTB: External Interrupt B
The INTB bit is set when an external interrupt at the INTB pin is detected.
• Bit 4 – INTA: External Interrupt A
The INTA bit is set when an external interrupt at the INTA pin is detected.
Note:
• Bit 3 – BUS INT: USB Bus Interrupt
When the USB reset separation feature is enabled (= SPRSIE and SPRSMSK bits 3 are set
to 1) the BUS INT bit is set when USB bus reset is detected by the USB hardware.
• Bit 2 – FRWUP: Function Remote Wakeup
The USB hardware sets this bit to signal that a key depression is detected indicating remote
wakeup. An interrupt is generated if the FRWUP IE bit of the SPRSIE register is set.
• Bit 1 – RSM: Resume
The USB hardware sets this bit when a USB resume signaling is detected at any of its port
except Port 1. An interrupt is generated if the RSM IE bit of the SPRSIE register is set.
• Bit 0 – GLB SUSP: Global Suspend
The USB hardware sets this bit when a USB global suspend signaling is detected. An interrupt is
generated if the GLBSUSP IE bit of the SPRSIE register is set.
Read/Write
Initial Value
$1FFA
Bit
INTA/B/C/D cannot be used to wake up the AT43USB325 from the suspend state.
INTD
R
7
0
INTC
R
6
0
INTB
R
5
0
INTA
R
4
0
BUS INT
R/W
3
0
FRWUP
R
2
0
RSM
R
1
0
GLB SUSP
R
0
0
3355C–USB–4/05
SPRSR