JAJSFW1E June 2017 – March 2019 66AK2G12
PRODUCTION DATA.
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SYSCLK_P/N is an optional LVDS clock input for the system reference clock.
DDR_CLK_P/N is an optional LVDS clock input for the DDR EMIF reference clock.
CPTS_REFCLK_P/N is optional LVDS clock input for the CPTS reference clock.
External connections to support these optional clock inputs are shown in Figure 5-14, where the respective pins are connected to an LVDS-compatible clock source. Refer to Table 5-18 and Figure 5-15 for respective input clock requirements.
Table 5-18 details the SYSCLK_P/N input clock requirements.
NAME | DESCRIPTION | MIN | TYP | MAX | UNIT | ||
---|---|---|---|---|---|---|---|
CK0 | fc(SYSCLK_P/N) | Frequency, SYSCLK_P/N | 19.2, 24, 25, 26 | MHz | |||
fc(DDR_CLK_P/N) | Frequency, DDR_CLK_P/N | 19.2, 24, 25, 26 | |||||
fc(CPTS_REFCLK_P/N) | Frequency, CPTS_REFCLK_P/N | 30.72 | 307.2 | ||||
CK1 | tw(SYSCLK_P/N) | Pulse duration, SYSCLK_P/N low or high | 1/(2.22 × fc(SYSCLK_P/N)) | 1/(1.82 × fc(SYSCLK_P/N)) | ns | ||
tw(DDR_CLK_P/N) | Pulse duration, DDR_CLK_P/N low or high | ||||||
tw(CPTS_REFCLK_P/N) | Pulse duration, CPTS_REFCLK_P/N low or high | ||||||
tj(SYSCLK_P/N) | Period jitter(1), SYSCLK_P/N | 50 | ps | ||||
tj(DDR_CLK_P/N) | Period jitter(1), DDR_CLK_P/N | 100 | |||||
tj(CPTS_REFCLK_P/N) | Period jitter(1), CPTS_REFCLK_P/N | 100 | |||||
tR(SYSCLK_P/N) | Rise time, SYSCLK_P/N (10%-90%) | 300 | ps | ||||
tR(DDR_CLK_P/N) | Rise time, DDR_CLK_P/N (10%-90%) | ||||||
tR(CPTS_REFCLK_P/N) | Rise time, CPTS_REFCLK_P/N (10%-90%) | ||||||
tF(SYSCLK_P/N) | Fall time, SYSCLK_P/N (90%-10%) | 300 | ps | ||||
tF(DDR_CLK_P/N) | Fall time, DDR_CLK_P/N (90%-10%) | ||||||
tF(CPTS_REFCLK_P/N) | Fall time, CPTS_REFCLK_P/N (90%-10%) | ||||||
fa(SYSCLK_P/N) | Frequency accuracy(4), SYSCLK_P/N | 50 | ppm | ||||
fa(DDR_CLK_P/N) | Frequency accuracy(2), DDR_CLK_P/N | 100 | |||||
fa(CPTS_REFCLK_P/N) | Frequency accuracy(2), CPTS_REFCLK_P/N | 100 |