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XR88C681 Datasheet, PDF (55/99 Pages) Exar Corporation – CMOS DUAL CHANNEL UART (DUART) | |||
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XR88C681
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Bit 7
Bit 6
Bit 5
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Bit 4
Bit 3
Bit 2
Bit 1
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Table 18
Bit 0
Table 17. Bit Format of the Clock Select Registers, CSRA and CSRB
Field
Bit Rate
CSR[7:4]
ACR[7] = 0
ACR[7] = 1
CSR[3:0]
X=0
X=1
X=0
X=1
6
>6
>6
6
1<6
1<6
1<6
1<6
6
6
1
1/
1
1/
/
<<:
/
<<:
==:
==:
6
6>/:
6>/:
<
6:
<
6:
<=
<=
<=
<=
>
=
=
>
/
/
/
/
1=<:
:
:
1=<:
(
(
(
(
2!
/5
2!
/5
2!
/5
2!
/5
2!
5
2!
5
2!
5
2!
5
Note: the b suffix denotes a binary expression. x = donât care value.
Table 18. Bit Format of the Clock Select Registers, CSR[3:0] and CSR[7:4]
Please note that = calls for the user to specify the
following parameters4
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