XR68C681J-F Datasheet, PDF (18/75 Pages) Exar Corporation – CMOS Dual Channel UART(DUART)

XR68C681
ISR[3] Counter Ready
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ISR[2]: Delta Break Indicator - Channel A
%%( +  (% ( ( $('%     '   '(
% $'$   -( ( -   $ +  '($ *3
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H22 *2 7
9 802 #82,I ' $
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*2 7 ' $(( " % % Section G.2
ISR[1] RXRDYA/FFULLA - Channel A Receiver
Ready or FIFO Full
  + '( +  (% ( (% %'$ & -( -
 M/N #+ -$ %   '( $&
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  ' ' + $ ( 9 "  $ (% $&   $ &
 
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ISR[0]: Channel A Transmitter Ready
 (% ("   %" ( $('%   9 (% &  $ (%
$&  ''  ' ' +  
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C.2 Interrupt Mask Register (IMR)
  (  %3 -(% (%  HA(  &I -(%
 ('  %   %  %'   ' $(( %   (
'%      (%%  (  C%   
'%% #   $%"   % %   ( +
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(+ +   # (% %% (&   % %   #
9" + ' %%"   ( + +   # (%
% $ (   +( - 
Bit 7
Input Port
Change
 J ++
 J 
Bit 6
Delta Break
B
 J ++
 J 
Bit 5
RXRDY/
FFULLB
 J ++
 J 
Bit 4
TXRDYB
 J ++
 J 
Bit 3
Counter
Ready
 J ++
 J 
Bit 2
Delta Break
A
 J ++
 J 
Bit 1
RXRDY/
FFULLA
 J ++
 J 
Bit 0
TXRDYA
 J ++
 J 
Table 6. IMR Bit Format
 
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