ZHCSIL6E June 2017 – March 2019 66AK2G12
PRODUCTION DATA.
The internal oscillator may be bypassed by connecting to an LVCMOS clock source as shown in Figure 5-11. The SYSOSC_IN pin is connected to the LVCMOS-Compatible clock source. The SYSOSC_OUT pin is left unconnected. The VSS_OSC_SYS pin is connected to board ground (VSS).
Figure 5-11 LVCMOS-Compatible Clock Input Table 5-17 details the SYSOSC_IN input clock timing requirements.
| NAME | DESCRIPTION | MIN | TYP | MAX | UNIT | ||
|---|---|---|---|---|---|---|---|
| CK0 | fc(SYSOSC_IN) | Frequency, SYSOSC_IN | 19.2, 24, 25, 26 | MHz | |||
| CK1 | tw(SYSOSC_IN) | Pulse duration, SYSOSC_IN low or high | 1/(2.22 × fc(SYSOSC_IN)) | 1/(1.82 × fc(SYSOSC_IN)) | ns | ||
| tj(SYSOSC_IN) | Period jitter(1), SYSOSC_IN | 50 | ps | ||||
| tR(SYSOSC_IN) | Rise time, SYSOSC_IN | 5 | ns | ||||
| tF(SYSOSC_IN) | Fall time, SYSOSC_IN | 5 | ns | ||||
| fa(SYSOSC_IN) | Frequency accuracy(4), SYSOSC_IN | 50 | ppm | ||||
– The maximum value is the difference between the longest measured clock period and the expected clock period
– The minimum value is the difference between the shortest measured clock period and the expected clock period
Figure 5-12 SYSOSC_IN Input Clock