CYP RXC User Manual download pdf (Page 32)

CYRF6936

Document #: 38-16015 Rev. *F Page 32 of 39

Figure 13-1. SPI Timing

Parameter Description Conditions Min. Typ. Max. Unit

LOAD_EXT

Average PMU External Load current V

BAT

= 1.8V, V

REG

= 2.73V,

0–50°C, RX Mode

15 mA

LOAD_EXT

Average PMU External Load current V

BAT

= 1.8V, V

REG

= 2.73V,

50–70°C, RX Mode

10 mA

13.0 AC Characteristics

[12]

Table 13-1. SPI Interface

[13]

Parameter Description Min. Typ. Max. Unit

SCK_CYC

SPI Clock Period 238.1 ns

SCK_HI

SPI Clock High Time 100 ns

SCK_LO

SPI Clock Low Time 100 ns

DAT_SU

SPI Input Data Set-up Time 25 ns

DAT_HLD

SPI Input Data Hold Time 10 ns

DAT_VAL

SPI Output Data Valid Time 0 50 ns

DAT_VAL_TRI

SPI Output Data Tri-state (MOSI from Slave Select Deassert) 20 ns

SS_SU

SPI Slave Select Set-up Time before first positive edge of SCK

[14]

10 ns

SS_HLD

SPI Slave Select Hold Time after last negative edge of SCK 10 ns

SS_PW

SPI Slave Select Minimum Pulse Width 20 ns

SCK_SU

SPI Slave Select Set-up Time 10 ns

SCK_HLD

SPI SCK Hold Time 10 ns

RESET

Minimum RST pin pulse width 10 ns

12.0 DC Characteristics(T = 25°C, V

BAT

= 2.4V, PMU disabled, f

OSC

= 12.000000MHz) (continued)

SCK

nSS

MOSI input

MISO

MOSI output

SCK_HI

SCK_LO

SS_SU

SCK_SU

SCK_CYC

SS_HLD

SCK_HLD

DAT_SU

DAT_HLD

DAT_VAL

DAT_VAL_TRI

Notes

12. AC values are not guaranteed if voltage on any pin exceed V

13. C

LOAD

= 30 pF.

14. SCK must start low at the time SS

goes low, otherwise the success of SPI transactions are not guaranteed.

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