CY7C68013A-56LTXI Cypress Semiconductor Corp, CY7C68013A-56LTXI Datasheet - Page 53

• Manufacturer Part Number: CY7C68013A-56LTXI
• Description: CY7C68013A-56LTXI
• Manufacturer: Cypress Semiconductor Corp
• Series: EZ-USB FX2LP™r

Specifications of CY7C68013A-56LTXI

• Applications: USB Microcontroller
• Core Processor: 8051
• Program Memory Type: ROMless
• Controller Series: CY7C680xx
• Ram Size: 16K x 8
• Interface: I²C, USB, USART
• Number Of I /o: 24
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 56-VQFN Exposed Pad, 56-HVQFN, 56-SQFN, 56-DHVQFN
• Cpu Family: FX2LP
• Device Core: 8051
• Device Core Size: 8b
• Frequency (max): 48MHz
• Interface Type: I2C/USART/USB
• Program Memory Size: Not Required
• Total Internal Ram Size: 16KB
• # I/os (max): 24
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 3V
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 105C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 56
• Package Type: QFN EP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: CY4611B - KIT USB TO ATA REFERENCE DESIGN428-1677 - KIT DEVELOPMENT EZ-USB FX2LP
• Lead Free Status / Rohs Status: Compliant

10.17.4 Sequence Diagram of a Single and Burst Asynchronous Write
Figure 34
in an asynchronous mode. The diagram shows a single write
followed by a burst write of 3 bytes and committing the 4 byte
short packet using PKTEND.
■
■
■
■
Document #: 38-08032 Rev. *M
At t = 0 the FIFO address is applied, insuring that it meets the
setup time of t
(SLCS may be tied low in some applications).
At t = 1 SLWR is asserted. SLWR must meet the minimum
active pulse of t
t
before SLWR is asserted.
At t = 2, data must be present on the bus t
deasserting edge of SLWR.
At t = 3, deasserting SLWR causes the data to be written from
the data bus to the FIFO and then increments the FIFO pointer.
WRpwh
FIFOADR
PKTEND
FLAGS
SLWR
DATA
SLCS
. If the SLCS is used, it must be asserted with SLWR or
shows the timing relationship of the SLAVE FIFO write
t=0
SFA
WRpwl
t
SFA
. If SLCS is used, it must also be asserted
t =1
Figure 34. Slave FIFO Asynchronous Write Sequence and Timing Diagram
t
and minimum de-active pulse width of
WRpwl
t=2
t
SFD
t=3
N
t
t
FDH
WRpwh
t
FAH
t
XFLG
SFD
T=0
t
before the
SFA
T=1
t
WRpwl
T=2
t
SFD
T=3
t
N+1
FDH
t
WRpwh
T=4
The same sequence of events are shown for a burst write and is
indicated by the timing marks of T = 0 through 5.
Note In the burst write mode, after SLWR is deasserted, the data
is written to the FIFO and then the FIFO pointer is incremented
to the next byte in the FIFO. The FIFO pointer is post incre-
mented.
In
SLWR is deasserted, the short 4 byte packet can be committed
to the host using the PKTEND. The external device should be
designed to not assert SLWR and the PKTEND signal at the
same time. It should be designed to assert the PKTEND after
SLWR is deasserted and met the minimum deasserted pulse
width. The FIFOADDR lines have to held constant during the
PKTEND assertion.
t
WRpwl
T=5
The FIFO flag is also updated after t
edge of SLWR.
Figure 34
t
SFD
T=6
t
N+2
FDH
t
WRpwh
after the four bytes are written to the FIFO and
T=7
t
WRpwl
CY7C68013A, CY7C68014A
CY7C68015A, CY7C68016A
T=8
t
SFD
T=9
t
t
N+3
WRpwh
FDH
[20]
t
XFLG
PEpwl
from the deasserting
t
XFLG
t
Page 53 of 62
PEpwh
t
FAH
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