ZHCSF38G March 2016 – May 2018 AM5716 , AM5718
PRODUCTION DATA.
A 1.8-V LVCMOS-Compatible Clock Input can be used instead of the internal oscillator to provide the SYS_32K clock input to the system. The external connections to support this are shown in Figure 6-12. The rtc_osc_xi_clkin32 pin is connected to the 1.8-V LVCMOS-Compatible clock sources. The rtc_osc_xo pin is left unconnected.
Table 6-11 summarizes the RTC Oscillator input clock electrical characteristics.
NAME | DESCRIPTION | MIN | TYP | MAX | UNIT | |
---|---|---|---|---|---|---|
CK0 | 1/tc(rtc_osc_xi_clkin32) | Frequency, rtc_osc_xi_clkin32 | 32.768 | kHz | ||
CK1 | tw(rtc_osc_xi_clkin32) | Pulse duration, rtc_osc_xi_clkin32 low or high | 0.45 * tc(rtc_osc_xi_clkin32) | 0.55 * tc(rtc_osc_xi_clkin32) | ns | |
CIN | Input capacitance | 2.178 | 2.378 | 2.578 | pF | |
IIN | Input current (3.3V mode) | 4 | 6 | 10 | µA | |
tsX | Start-up time | See (1) | ms |