Cypress CY7C67200 manual Host n PID Register W

CY7C67200

ACK Flag (Bit 0)

The ACK Flag bit indicates two different conditions depending on the transfer type. For non-Isochronous transfers, this bit represents a transaction ending by receiving or sending an ACK packet. For Isochronous transfers, this bit represents a successful transaction that will not be represented by an ACK packet.

1:For non-Isochronous transfers, the transaction was ACKed. For Isochronous transfers, the transaction was completed successfully.

0:For non-Isochronous transfers, the transaction was not ACKed. For Isochronous transfers, the transaction was not completed successfully.

Host n PID Register [W]

•Host 1 PID Register 0xC086

•Host 2 PID Register 0xC0A6

Figure 22. Host n PID Register

Bit #	15	14	13	12		11	10	9	8
Field					Reserved
Read/Write	-	-	-	-		-	-	-	-
Default	0	0	0	0		0	0	0	0

Bit #	7	6		5	4	3	2	1	0
Field			PID Select				Endpoint Select
Read/Write	W	W		W	W	W	W	W	W
Default	0	0		0	0	0	0	0	0

Register Description

The Host n PID register is a write-only register that provides the PID and Endpoint information to the USB SIE to be used in the next transaction.

PID Select (Bits [7:4])

The PID Select field defined as in Table 26. ACK and NAK tokens are automatically sent based on settings in the Host n Control register and do not need to be written in this register.

Table 26.PID Select Definition

PID TYPE	PID Select [7:4]
set-up	1101 (D Hex)
IN	1001 (9 Hex)
OUT	0001 (1 Hex)
SOF	0101 (5 Hex)

Table 26.PID Select Definition	(continued)
PID TYPE	PID Select [7:4]
PREAMBLE	1100 (C Hex)
NAK	1010 (A Hex)
STALL	1110 (E Hex)
DATA0	0011 (3 Hex)
DATA1	1011 (B Hex)

Endpoint Select (Bits [3:0])

The Endpoint field allows addressing of up to 16 different endpoints.

Reserved

All reserved bits must be written as ‘0’.

Document #: 38-08014 Rev. *G Page 23 of 78

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