CYWUSB6934 Cypress Semiconductor Corporation., CYWUSB6934 Datasheet - Page 25

• Manufacturer Part Number: CYWUSB6934
• Description: Ls 2.4-ghz Dsss Radio Soc
• Manufacturer: Cypress Semiconductor Corporation.

12.0
Table 12-1. SPI Interface
Notes:
Document 38-16007 Rev. *I
15. AC values are not guaranteed if voltages on any pin exceed Vcc.
16. This stretch only applies to every 9th SCK HI pulse for SPI Burst Reads only.
17. For F
18. SCK must start low, otherwise the success of SPI transactions are not guaranteed.
t
t
t
t
t
t
t
t
t
SCK_CYC
SCK_HI (BURST READ)
SCK_HI
SCK_LO
DAT_SU
DAT_HLD
DAT_VAL
SS_SU
SS_HLD
M ISO
M O S I
M IS O
SCK
S C K
SS
Parameter
S S
OSC
AC Characteristics
= 13 MHz ±50 ppm, 3.3v @ 25°C.
t
D A T _ S U
t
S S _ S U
[16]
data to m cu
d a ta fro m m c u
SPI Clock Period
SPI Clock High Time
SPI Clock High Time
SPI Clock Low Time
SPI Input Data Set-up Time
SPI Input Data Hold Time
SPI Output Data Valid Time
SPI Slave Select Set-up Time before first positive edge of SCK
SPI Slave Select Hold Time after last negative edge of SCK
every 8
Figure 12-2. SPI Burst Read Every 9th SCK HI Stretch Timing Diagram
[17]
t
SCK_HI
th
SC K_HI
t
S C K _ H I
t
D A T _ H L D
t
[15]
SCK_CYC
t
S C K _ C Y C
t
DAT_VAL
t
Figure 12-1. SPI Timing Diagram
SCK_LO
t
S C K _ L O
Description
t
D A T _ V A L
d a ta fro m m c u
d a ta to m c u
data to m cu
t
SC K_HI (BU RST READ)
every 9
th
SC K_HI
[18]
d a ta to m c u
d a ta fro m m c u
97
77
Min.
476
238
158
158
250
10
80
data to m cu
[17]
[17]
every 10
CYWUSB6932
CYWUSB6934
Typ.
th
SCK_HI
t
S S _ H L D
174
Max.
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[17]
d a ta
d a ta
data
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns