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Serial Controller Module
8X
Fbrg = FXTALE/[2 * 8 * (N+1)]
230400 = 3686400/2*8*(N+1) or
2*8*(N+1) = 3686400/230400 or
2*8*(N+1) = 16 or
N = 16/16-1 = 0
Max baudrate @ 8X = 230.4K
With the 18.432MHz crystal using SYSCLK as the clock source:
Max. baudrate depends on speed grade. Max. programmable baudrate = SYSCLK/32;
max recommended baudrate is 922K.
16X @ 55.296MHz
Fbrg = SYSCLK/[2 * 16 * (N+1)]
1728000 = 55296000/2*16*(N+1) or
2*16*(N+1) = 55296000/1728000 or
2*16*(N+1) = 32 or
N = 32/32-1 = 0
Max programmable baudrate = 1,728K
16X @ 46.08MHz
Fbrg = SYSCLK/[2 * 16 * (N+1)]
1440000 = 46080000/2*16*(N+1) or
2*16*(N+1) = 46080000/1440000 or
2*16*(N+1) = 32 or
N = 32/32-1 = 0
Max programmable baudrate = 1,440K
16X @ 36.864MHz
Fbrg = SYSCLK/[2 * 16 * (N+1)]
1152000 = 36864000/2*16*(N+1) or
2*16*(N+1) = 36864000/1152000 or
2*16*(N+1) = 16 or
N = 32/32-1 = 0
Max programmable baudrate = 1,152K