參數(shù)資料
型號: XR88C681
廠商: Exar Corporation
英文描述: CMOS DUAL CHANNEL UART (DUART)
中文描述: CMOS雙通道UART(杜阿爾特)
文件頁數(shù): 15/99頁
文件大小: 1913K
代理商: XR88C681
XR88C681
6
'"
-(%% $(%'%%$ ( $( (
B.2 Command Decoding
2' ' (% E($ ( $ -(% # -"
.$(% %(" .$(% '(" - ( +'(((- %(% + (%'%
'$% ( + + ' $ -(% (% %$ (
% -(' $$%%
+% $ +'(% +
'$ & $
Section G.3
+ % $ -(%%
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Miscellaneous Commands
Enable/Disable
Receiver
Enable/Disable
Transmitter
(-!
J 7 -
J 2 !
J (% !
J 7 ($ $ %
J 7 -
J 2 !
J (% !
J 7 ;($ %
Table 2. (CRA, CRB) Bit Format for Command Registers of Channels A & B
+'( + (+ $-(%%(% +(&%(-+$ (% ((% %$ (
$(% %( $. '(
(+ $-(% (% %$ (3 %(% +(%'%'$%
'$% %%'($ ( ( + $ -(%%
1
16
through B
16
effects only the performance of Command Register’s Channel
8" '$%
++'% %&% '( (
Table 3
$+(%
Please note that the upper nibble commands
/
$
/
Bit 7
Bit 6
Bit 5
Bit 4
Description
Null Command.
Reset MRn Pointer.
%% H%
( (
Reset Receiver.
% ($(($ '
'( % (+ 8$ % % ($
'( (% $(%$ $ # (% +%$
Reset Transmitter.
%% ($(($ '
%(% (+ 8$ % $ ($
5 (% +'$ (-
Table 3. Miscellaneous Commands, Upper Nibble of all Command Registers,
Unless Otherwise Specified (Cont’d Next Page)
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