SNAS824B October 2021 – June 2022 LMX2571-EP
PRODUCTION DATA
15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
0 | 0 | MULT_WAIT | OUTBUF_AUTOMUTE | OUTBUF_TX_TYPE | OUTBUF_RX_TYPE | ||||||||||
R/W-0h | R/W-C8h | R/W-1h | R/W-1h | R/W-1h |
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset |
BIT | FIELD | TYPE | RESET | DESCRIPTION |
---|---|---|---|---|
15-14 | R/W | 0h | Program 0h to this field. | |
13-3 | MULT_WAIT | R/W | C8h | A 20-µs settling time is required for MULT, if it is enabled. These bits set the correct settling time according to the OSCin frequency. For example, if OSCin frequency is 100 MHz, set these bits to 2000. No matter if MULT is enabled or not, the configured MULT settling time forms part of the total frequency switching time. |
2 | OUTBUF_AUTOMUTE | R/W | 1h | If this bit is set, the output buffers will be muted until PLL is locked. This bit applies to the following events: (a) device initialization (b) manually change VCO frequency, and (c) F1F2 switching. However, if the PLL is unlocked afterward (for example, OSCin is removed), the output buffers will not be muted and will remain active. |
1 | OUTBUF_TX_TYPE | R/W | 1h | Sets the output buffer type of RFoutTx. If the
buffer is open drain output, a pullup to VccIO is required. See
Section 8.1.8 for details. |
0 | OUTBUF_RX_TYPE | R/W | 1h | Sets the output buffer type of RFoutRx. If the
buffer is open drain output, a pullup to VccIO is required. See
Section 8.1.8 for details. |