ZHCSLA7C December 2019 – September 2023 AM6526 , AM6528 , AM6546 , AM6548
PRODUCTION DATA
Figure 6-22 shows the recommended oscillator connections when OSC1 is connected to an LVCMOS square-wave digital clock source The 1.8-V LVCMOS-Compatible clock source is connected to the OSC1_XI pin. In this mode of operation, the OSC1_XO pin is left unconnected and should not be used to source any external components.
Figure 6-22 1.8-V LVCMOS-Compatible Clock InputTable 6-20 summarizes the OSC1 input clock electrical characteristics.
| NAME | DESCRIPTION | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|
| f | Frequency | 19.2, 20, 24, 25, 26, 27 | MHz | ||
| CIN | Input capacitance | 2.184 | 2.384 | 2.584 | pF |
| IIN | Input current (3.3V mode) | 4 | 6 | 10 | µA |
Table 6-21 details the OSC1 input clock timing requirements.
| NAME | DESCRIPTION | MIN | TYP | MAX | UNIT | ||
|---|---|---|---|---|---|---|---|
| CK0 | 1 / tc(OSC1_XI) | Frequency, OSC1_XI | 19.2, 20, 24, 25, 26, 27 | MHz | |||
| CK1 | tw(OSC1_XI) | Pulse duration, OSC1_XI low or high | 0.45 × tc(OSC1_XI) | 0.55 × tc(OSC1_XI) | ns | ||
| tj(OSC1_XI) | Period jitter, OSC1_XI | 0.01 × tc(OSC1_XI) | ns | ||||
| tR(OSC1_XI) | Rise time, OSC1_XI | 5 | ns | ||||
| tF(OSC1_XI) | Fall time, OSC1_XI | 5 | ns | ||||
| tj(OSC1_XI) | Frequency accuracy, OSC1_XI | Ethernet RGMII and RMII not used | ±100 | ppm | |||
| Ethernet RGMII and RMII using derived clock | ±50 | ||||||
Figure 6-23 OSC1_XI Input Clock