SPRS797D November 2012 – June 2020 TMS320F28050 , TMS320F28051 , TMS320F28052 , TMS320F28052F , TMS320F28052M , TMS320F28053 , TMS320F28054 , TMS320F28054F , TMS320F28054M , TMS320F28055
PRODUCTION DATA.
The on-chip crystal oscillator X1 and X2 pins are 1.8-V level signals and must never have 3.3-V level signals applied to them. If a system 3.3-V external oscillator is to be used as a clock source, it should be connected to the XCLKIN pin only. The X1 pin is not intended to be used as a single-ended clock input, it should be used with X2 and a crystal.
Table 6-18 lists the typical specifications for the external quartz crystal (fundamental mode, parallel resonant). Furthermore, ESR range = 30 to 150 Ω.
FREQUENCY (MHz) | Rd (Ω) | CL1 (pF) | CL2 (pF) |
---|---|---|---|
5 | 2200 | 18 | 18 |
10 | 470 | 15 | 15 |
15 | 0 | 15 | 15 |
20 | 0 | 12 | 12 |
NOTE