CY7C66113C-XC CYPRESS [Cypress Semiconductor], CY7C66113C-XC Datasheet - Page 47

• Manufacturer Part Number: CY7C66113C-XC
• Description: Full-Speed USB (12 Mbps) Peripheral Controller with Integrated Hub
• Manufacturer: CYPRESS [Cypress Semiconductor]

Document #: 38-08024 Rev. *B
20.0
Table 20-1. USB Register Mode Encoding
Mode
This lists the mnemonic given to the different modes that can be set in the Endpoint Mode Register by writing to the lower nibble
(bits 0..3). The bit settings for different modes are covered in the column marked “Mode Bits.” The Status IN and Status OUT
represent the Status stage in the IN or OUT transfer involving the control endpoint.
Mode Bits
These column lists the encoding for different modes by setting Bits[3..0] of the Endpoint Mode register. This modes represents
how the SIE responds to different tokens sent by the host to an endpoint. For instance, if the mode bits are set to “0001” (NAK
IN/OUT), the SIE will respond with an
Refer to section 13.0 for more information on SIE functioning.
SETUP, IN, and OUT
These columns shows the SIE’s response to the host on receiving a SETUP, IN and OUT token depending on the mode set in
the Endpoint Mode Register.
A “Check” on the OUT token column, implies that on receiving an OUT token the SIE checks to see whether the OUT packet is
of zero length and has a Data Toggle (DTOG) set to ‘1.’ If the DTOG bit is set and the received OUT Packet has zero length, the
OUT is ACKed to complete the transaction. If either of this condition is not met the SIE will respond with a STALLL or just ignore
the transaction.
A “TX Count” entry in the IN column implies that the SIE transmit the number of bytes specified in the Byte Count (bits 3..0 of the
Endpoint Count Register) to the host in response to the IN token received.
A “TX0 Byte” entry in the IN column implies that the SIE transmit a zero length byte packet in response to the IN token received
from the host.
An “Ignore” in any of the columns means that the device will not send any handshake tokens (no ACK) to the host.
An “Accept” in any of the columns means that the device will respond with an ACK to a valid SETUP transaction to the host.
Note:
Disable
Nak In/Out
Status Out Only
Stall In/Out
Ignore In/Out
Isochronous Out
Status In Only
Isochronous In
Nak Out
Ack Out(STALL
Ack Out(STALL
Nak Out - Status In
Ack Out - Status In
Nak In
Ack IN(STALL
Ack IN(STALL
Nak In – Status Out 1110
Ack In – Status Out
4.
• ACK on receiving a SETUP token from the host
• NAK on receiving an OUT token from the host
• NAK on receiving an IN token from the host
STALL bit is bit 7 of the USB Non-Control Device Endpoint Mode registers. For more information, refer to section 19.4.
Mode
USB Mode Tables
[4]
[4]
[4]
[4]
=0)
=1)
=1)
=0)
Mode
Bits
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1001
1010
1011
1100
1101
1101
1111
ignore ignore
accept NAK
accept stall
accept stall
accept ignore
ignore ignore
accept TX 0 Byte stall
ignore TX count ignore For Isochronous endpoints
ignore ignore
ignore
ignore
accept TX 0 Byte NAK
accept TX 0 Byte ACK
ignore NAK
ignore
ignore
accept NAK
accept TX Count check On issuance of an ACK this mode is changed by SIE to 1110 (NAK In
SETUP
ignore
ignore
TX count
stall
IN
ignore Ignore all USB traffic to this endpoint
NAK
check For Control endpoints
stall
ignore For Control endpoints
always For Isochronous endpoints
NAK
ACK
stall
ignore Is set by SIE on an ACK from mode 1101 (Ack In)
ignore
ignore
check Is set by SIE on an ACK from mode 1111 (Ack In – Status Out)
OUT
Forced from Setup on Control endpoint, from modes other than 0000
For Control endpoints
For Control Endpoints
Is set by SIE on an ACK from mode 1001 (Ack Out)
On issuance of an ACK this mode is changed by SIE to 1000 (NAK Out)
Is set by SIE on an ACK from mode 1011 (Ack Out- Status In)
On issuance of an ACK this mode is changed by SIE to 1010 (NAK Out
– Status In)
On issuance of an ACK this mode is changed by SIE to 1100 (NAK In)
– Status Out)
Comments
CY7C66013C
CY7C66113C
Page 47 of 61
[+] Feedback
[+] Feedback