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NRF51822-CFAB-R7 Datasheet(PDF) 57 Page - Nordic Semiconductor |
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NRF51822-CFAB-R7 Datasheet(HTML) 57 Page - Nordic Semiconductor |
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57 / 130 page  Page 57 nRF51822 Product Specification v3.3 8.8 Serial Peripheral Interface Slave (SPIS) specifications Table 44 SPIS specifications Figure 12 SPIS timing diagram, one byte transmission, SPI Mode 0 Table 45 SPIS timing parameters Symbol Description Min. Typ. Max. Units Test level ISPIS125K Run current for SPI slave at 125 kbps.1 1. CSN asserted. 180 μA 1 ISPIS2M Run current for SPI slave at 2 Mbps.1 183 μA 1 fSPIS Bit rates for SPIS. 0.125 42 2. This bit rate is only possible if the instructions are followed in Section 4.10.1 “Enable 4 Mbps SPIS bit rate” on page 35. Mbps N/A Symbol Description Note Min. Typ. Max. Units Test level tDC Data to SCK setup. 10 ns 1 tDH SCK to data hold. 10 ns 1 tCSD CSN to data valid. Low power mode.1 Constant latency mode.1 1. For more information on how to control the sub power modes, see the nRF51 Series Reference Manual. 7100 2100 ns 1 tCD SCK to data valid. CLOAD = 10 pF 972 2. Increases/decreases with 1.2 ns/pF load. ns 1 tCL SCK low time. 40 ns 1 tCH SCK high time. 40 ns 1 tCC CSN to SCK setup. Low power mode.1 Constant latency mode.1 7000 2000 ns 1 tCCH Last SCK edge to CSN hold. 2000 ns 1 tCWH CSN inactive time. 300 ns 1 tCDZ CSN to output high Z. 40 ns 1 fSCK SCK frequency. 0.125 2 MHz 1 tR,tF SCK rise and fall time. 100 ns 1 b7 b6 b0 b7 b0 tCD tDH tDC tCL tCH SCK MOSI MISO CSN tCWH tCDZ tCCH tCSD tCC |
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