CY7C67200-48BAI Cypress Semiconductor Corp, CY7C67200-48BAI Datasheet - Page 22

• Manufacturer Part Number: CY7C67200-48BAI
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C67200-48BAI

• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Operating Temperature (max): 85C
• Package Type: FBGA
• Rad Hardened: No
• Lead Free Status / Rohs Status: Not Compliant

Document #: 38-08014 Rev. *G
Host n Endpoint Status Register [R]
Register Description
The Host n Endpoint Status register is a read-only register that
provides status for the last USB transaction.
Overflow Flag (Bit 11)
The Overflow Flag bit indicates that the received data in the
last data transaction exceeded the maximum length specified
in the Host n Count Register. The Overflow Flag should be
checked in response to a Length Exception signified by the
Length Exception Flag set to ‘1’.
1: Overflow condition occurred
0: Overflow condition did not occur
Underflow Flag (Bit 10)
The Underflow Flag bit indicates that the received data in the
last data transaction was less then the maximum length
specified in the Host n Count register. The Underflow Flag
should be checked in response to a Length Exception signified
by the Length Exception Flag set to ‘1’.
1: Underflow condition occurred
0: Underflow condition did not occur
Stall Flag (Bit 7)
The Stall Flag bit indicates that the peripheral device replied
with a Stall in the last transaction.
1: Device returned Stall
0: Device did not return Stall
NAK Flag (Bit 6)
The NAK Flag bit indicates that the peripheral device replied
with a NAK in the last transaction.
1: Device returned NAK
0: Device did not return NAK
Bit #
Field
Read/Write
Default
Bit #
Field
Read/Write
Default
• Host 1 Endpoint Status Register 0xC086
• Host 2 Endpoint Status Register 0xC0A6
Stall
Flag
15
R
0
7
0
-
NAK
Flag
14
R
0
6
0
-
Reserved
Figure 21. Host n Endpoint Status Register
Exception
Length
Flag
13
R
0
5
0
-
Reserved
12
0
4
0
-
-
Length Exception Flag (Bit 5)
The Length Exception Flag bit indicates the received data in
the data stage of the last transaction does not equal the
maximum Host Count specified in the Host n Count register. A
Length Exception can either mean an overflow or underflow
and the Overflow and Underflow flags (bits 11 and 10, respec-
tively) should be checked to determine which event occurred.
1: An overflow or underflow condition occurred
0: An overflow or underflow condition did not occur
Sequence Status (Bit 3)
The Sequence Status bit indicates the state of the last received
data toggle from the device. Firmware is responsible for
monitoring and handling the sequence status. The Sequence
bit is only valid if the ACK bit is set to ‘1’. The Sequence bit is
set to ‘0’ when an error is detected in the transaction and the
Error bit will be set.
1: DATA1
0: DATA0
Timeout Flag (Bit 2)
The Timeout Flag bit indicates if a timeout condition occurred
for the last transaction. A timeout condition can occur when a
device either takes too long to respond to a USB host request
or takes too long to respond with a handshake.
1: Timeout occurred
0: Timeout did not occur
Error Flag (Bit 1)
The Error Flag bit indicates a transaction failed for any reason
other than the following: Timeout, receiving a NAK, or
receiving a STALL. Overflow and Underflow are not
considered errors and do not affect this bit. CRC5 and CRC16
errors will result in an Error flag along with receiving incorrect
packet types.
1: Error detected
0: No error detected
Sequence
Overflow
Status
Flag
11
R
R
0
3
0
Underflow
Timeout
Flag
Flag
10
R
R
0
2
0
Error
Flag
R
9
0
1
0
-
CY7C67200
Reserved
Page 22 of 78
ACK
Flag
R
8
0
0
0
-
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