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XR88C681 Datasheet, PDF (14/99 Pages) Exar Corporation – CMOS DUAL CHANNEL UART (DUART) | |||
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XR88C681
Address (Hex)
1
<
6
/
>
=
*
2
Read Mode Registers
Register Name
Symbol
$ -(%"
"
% -(%"
%3$ #
% -(%
#
! 8$(
- -(%"
8
#
,
-
-(%
#,
#
%
#
-(%
.(
*& -(%
.( 9
9
*& -(%
$ -(%"
*
*" *
% -(%"
*
*
22;2
! 8$(
- -(%"
*
#
;'
-(%
#
,
8*
#;
#,
.(
$
.(
$
Write Mode Registers
Register Name
Symbol
$ -(%"
"
'3 ' -(%"
$ -(%
! 8$(
- -(%"
!((&
-(%
#
%3 -(%
8
#
.(
*& -(%
.( 9
*& -(%
$ -(%"
*
'3 ' -(%"
*
$ -(%"
*
! 8$(
- -(%"
*
#
;'
-(%
,
+(-(
-(%
, ,>
, *(%
$
, *(%
$
9
*" *
*
*
8*
#;
,
,*
,*
Table 1. DUART Port and Register Addressing
Note: The shaded blocks are not Read/Write registers but are rather âAddress-Triggeredâ Commands.
Table 1 (
$('% ' '
(% E($ ( $ -(%%
%%'($ ( ' + % $ -(%
(% (% C$ -(%D (
(
' (.%&% 22 ' (
(% C(
(
- D
'
-(% Please note that the suffix ânâ is used at the end of many of the DUART registers symbols in
order to refer, generically, to either channels A or B 8" '
% + (
( % (+ + $$%%
+
-(% +
-(%" ($(& +(
-
& $ B( ''%%
-(%
(
( '
(
C(
D
-(%
( $ % ''%
( C22
,#72D '
$ %
(
3$ C22 ,#72D '
$ '
(%%$ & ((
-
( $ ( '
H%
$ -(% +" $ -(%%" ( (
-(
<
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