XR82C684CJ-F Datasheet, PDF (61/107 Pages) Exar Corporation – CMOS Quad Channel UART(QUART)

XR82C684
D.3.2 COUNTER MODE
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D.4 External Inputs
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 Please note that the user
can specify whether a clock signal, applied to one of these
external inputs, is a 1X or a 16X clock signal; via the Clock
Select Registers (see below). For a more detailed
discussion on the Input Port pins and their function,
please see Section E.
D.5 Clock Select Registers, CSRA, CSRB, CSRC,
and CSRD
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Table 14, Table 15   Table 15A %   
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Bit 7
Bit 6
Bit 5
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 Table 15  Table 15A
Bit 4
Bit 3
Bit 2
Bit 1
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 Table 15  Table 15A
Table 14. Bit Format of the Clock Select Registers, CSRA and CSRB
Bit 0
 
.