CYWUSB6935 Cypress Semiconductor Corporation., CYWUSB6935 Datasheet - Page 27

• Manufacturer Part Number: CYWUSB6935
• Description: Lr 2.4-ghz Dsss Radio Soc
• Manufacturer: Cypress Semiconductor Corporation.

12.2
Table 12-4. Power Management Timing
Notes:
Document #: 38-16008 Rev. *D
23. The PD pin must be asserted at power up to ensure proper crystal startup.
24. When X13OUT is enabled.
25. Both the polarity and the drive method of the IRQ pin are programmable. See page 10 for more details. Figure 12-6 illustrates default values for the Configuration
26. A wakeup event is triggered when the PD pin is deasserted. Figure 12-6 illustrates a wakeup event configured to trigger an IRQ pin event via the Wake Enable
27. Measured with CTS ATXN6077A crystal.
t
t
t
t
t
t
t
t
t
t
t
PDN_X13
SPI_RDY
PWR_RST
RST
PWR_PD
WAKE
PD
SLEEP
WAKE_INT
STABLE
STABLE2
Parameter
X 1 3 O U T
X13OUT
R E S E T
register (Reg 0x05, bits 1:0).
register (Reg 0x1C, bit 0=1).
V C C
P D
IRQ
Power Management Timing
PD
Time from PD deassert to X13OUT
Time from oscillator stable to start of SPI transactions
Power On to RESET deasserted
Minimum RESET asserted pulse width
Power On to PD deasserted
PD deassert to clocks running
Minimum PD asserted pulse width
PD assert to low power mode
PD deassert to IRQ
PD deassert to clock stable
IRQ assert (wake interrupt) to clock stable
t
t
P W R _ R S T
P W R _ P D
t
SLEEP
[25]
t
t
P D N _ X 1 3
Description
PD
assert (wake interrupt)
Figure 12-5. Power On Reset/Reset Timing
(The values below are dependent upon oscillator network component selection)
[23]
[24]
Figure 12-6. Sleep / Wake Timing
t
S P I_ R D Y
t
t
WAKE
WAKE_INT
[26]
to within ±10 ppm
to within ±10 ppm
V
Conditions
CC
t
@ 2.7V
STABLE
t
STABLE2
1300
1300
Min.
10
1
1
t
R S T
CYWUSB6935
2000
2000
2000
2100
2100
Typ
50
[27]
Max.
Page 27 of 32
Unit
µs
µs
µs
µs
µs
µs
µs
ns
µs
µs
µs
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