CY7C68003-24LQXI Ver la hoja de datos (PDF) - Cypress Semiconductor
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CY7C68003-24LQXI Datasheet PDF : 30 Pages
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CY7C68003
Synchronous Operation Modes
This section describes the synchronous mode of TX2UL ULPI interface protocol.
ULPI Transmit Command Byte (TX CMD)
The Link initiates transfers to TX2UL by sending the Transmit Command Byte as shown in Table 9. TX CMD byte consists of a 2-bit
command code and a 6-bit payload.
Table 9. Transmit Command (TX CMD) Byte Format
Byte Name
Special
Transmit
RegWrite
RegRead
Command Code Data (7:6)
00b
01b
10b
11b
Command Payload Data (5:0)
000000b
(NOOP)
XXXXXXb
(RSVD)
000000b
(NOPID)
00XXXXb
XXXXXXb
(PID)
(RSVD)
101111b
XXXXXXb
101111b
XXXXXXb
(EXTW)
(REGW)
(EXTR)
(REGR)
Command Description
No operation. 00h is the idle value of the data
bus. The Link drives NOOP by default.
Reserved command space. Values other than
those mentioned give undefined behavior.
Transmit USB data that does not have a PID,
such as chirp and resume signalling. The
TX2UL starts transmitting on the USB
beginning with the next byte.
Transmit USB packet. data (3:0) indicates
USB packet identifier PID (3:0)
Reserved Command space. Values other
than those mentioned give undefined
behavior.
Extended register write command. 8-bit
address available in the next cycle.
Register write command with 6-bit immediate
address.
Extended register read command. 8-bit
address available in the next cycle.
Register read command with 6-bit immediate
address.
ULPI Receive Command Byte (RX CMD)
The Receive Command Byte, as shown in Table 10, is sent by TX2UL to update the link with LineState and USB receive information.
The USB receive information includes LineState, RxActive, and RxError. After a USB transmit, TX2UL sends RX CMD with LineState
indicating EOP to the link. For High Speed, EOP is the squelch to squelch transition on LineState. Figure 7 on page 10 shows how
TX2UL sends RX CMD information to the link. The first packet shows a single RX CMD. If back to back changes are detected, TX2UL
keeps DIR asserted and sends back to back RX CMDs as shown in the second packet.
Table 10. Receive Command (RX CMD) Byte Format
Data
Name
Description and Value
1:0
LineState
ULPI LineState signals.
DATA[0] = LineState (0)
DATA[1] = LineState (1)
3:2
Reserved
5:4
RxEvent
Encoded UTMI event signals
Value
RxActive
RxError
00
0
0
01
1
0
11
1
1
10
X
X
7:6
Reserved
Document Number: 001-15775 Rev. *L
Page 9 of 30
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