Crystals

General purpose multiples of 1 MHz

`1`	`3`	`5`
`2`	`6`	`10`
`4`	`12`	`20`
`8`	`24`	`25`
`16`

Timekeeping

`0.032768`	`= 2^15 x 1 Hz`	`Watch`
`4.096000`	`= 2^12 x 1 kHz`
`6.553600`	`= 2^16 x 100 Hz`
`4.194304`	`= 2^22 x 1 Hz`
`6.400000`	`= 2^5 x 100 kHz`

Television

`3.5795454`	`= 4.5 x 35/44`	`TV NTSC`
`14.3181818`	`= 4.5 x 35/11`	`TV NTSC x 4`
`4.3361875`		`TV PAL`
`17.7344700`		`TV PAL x 4`

Baud rate generation

F/MHz	`Multiple of 16 x 4800 = 76800`
`1.8432`	`24`
`2.4576`	`32`
`3.6864`	`48`
`4.9152`	`64`
`4.6080`	`60`
`5.0688`	`66`
`6.1440`	`80`
`7.3728`	`96`
`9.8304`	`128`
`11.0592`	`132`
`14.7456`	`192`
`18.4320`	`240`
`19.6608`	`256`
`35.2512`	`459`