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LPC802 数据表(PDF) 53 Page - NXP Semiconductors |
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LPC802 数据表(HTML) 53 Page - NXP Semiconductors |
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53 / 83 page ![]() LPC802 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2018. All rights reserved. Product data sheet Rev. 1.6 — 27 April 2018 53 of 83 NXP Semiconductors LPC802 32-bit ARM Cortex-M0+ microcontroller 13.6 SPI interfaces The actual SPI bit rate depends on the delays introduced by the external trace, the external device, system clock (CCLK), and capacitive loading. Excluding delays introduced by external device and PCB, the maximum supported bit rate for SPI master mode is 15 Mbit/s, and the maximum supported bit rate for SPI slave mode is 1/(2 x 28 ns) = 17.8 Mbit/s at 3.0v <= VDD <= 3.6v and 1/(2 x 32 ns) = 15.6 Mbit/s at 1.7v <= VDD <= 3.0v. Remark: SPI functions can be assigned to all digital pins. The characteristics are valid for all digital pins. Table 21. SPI dynamic characteristics Tamb = 40 C to 105 C; CL = 20 pF; input slew = 1 ns. Simulated parameters sampled at the 30 % and 70 % level of the rising or falling edge; values guaranteed by design. Delays introduced by the external trace or external device are not considered. Symbol Parameter Conditions Min Max Unit SPI master tDS data set-up time 1.71 V <= VDD <= 3.6 V 10 - ns tDH data hold time 1.71 V <= VDD <= 3.6 V 7 - ns tv(Q) data output valid time 1.71 V <= VDD <= 3.6 V 0 2 ns SPI slave tDS data set-up time 1.71 V <= VDD <= 3.6 V 10 - ns tDH data hold time 1.71 V <= VDD <= 3.6 V 7 - ns tv(Q) data output valid time 3.0 V <= VDD <= 3.6 V 0 28 ns 1.71 V <= VDD < 3.0 V 0 32 ns |
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