CY7C68300C-56PVXCT Cypress Semiconductor Corp, CY7C68300C-56PVXCT Datasheet - Page 13

• Manufacturer Part Number: CY7C68300C-56PVXCT
• Description: CY7C68300C-56PVXCT
• Manufacturer: Cypress Semiconductor Corp
• Series: CY7Cr

Specifications of CY7C68300C-56PVXCT

• Controller Type: USB 2.0 Controller
• Interface: I²C
• Voltage - Supply: 3.15 V ~ 3.45 V
• Current - Supply: 50mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 56-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: CY4615B - KIT USB TO ATA REFERENCE DESIGN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SYSIRQ
The SYSIRQ pin provides a way for systems to request service
from host software by using the USB Interrupt pipe on endpoint
1 (EP1). If the AT2LP has no pending interrupt data to return,
USB interrupt pipe data requests are NAKed. If pending data is
available, the AT2LP returns 16 bits of data. This data indicates
whether AT2LP is operating in high speed or full speed, whether
the AT2LP is reporting self-powered or bus-powered operation,
and the states of any GPIO pins that are configured as inputs.
GPIO pins can be individually set as inputs or outputs, with byte
Table 3. Interrupt Data Bitmap
Document 001-05809 Rev. *B
7
6
5
EP1 Data Byte 1
NAK Request
4
No
3
Return Interrupt Data
Set Int_Data = 0
USB Interrupt
Int_Data = 1?
Pipe Polled?
Yes
Yes
2
Figure 8. SYSIRQ Latching Algorithm
1
No
0
7
0x09 of the configuration data. The state of any GPIO pin that is
not set as an input is reported as ‘0’ in the EP1 data.
Table 3
pipe and
the AT2LP.
The SYSIRQ pin must be pulled LOW if HID functionality is used.
Refer to
details on HID functionality.
6
gives the bitmap for the data returned on the interrupt
“HID Functions for Button Controls”
Figure 8
Yes
5
No
CY7C68300C, CY7C68301C
CY7C68320C, CY7C68321C
depicts the latching algorithm incorporated by
EP1 Data Byte 0
Latch State of IO Pins
4
Set Int_Data = 1
SYSIRQ=1?
Int_Data = 0
SYSIRQ=0?
Yes
and
3
2
on page 15 for more
No
1
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