XR82C684CJTR/44-F View Datasheet(PDF) - Exar Corporation

Part Name

Description

MFG CO.

XR82C684CJTR/44-F

CMOS Quad Channel UART (QUART)

Exar Corporation 

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$(( +PB7Q

11111111

! )%# !B  !

11110000

XR82C684

 *  +  +(% +9  +0

00000000

! %% 

( +PB7Q

00001111

11110000

Figure 39A. Illustration of the “Clear Output Port Bit #2” Command and Its Effect on

Output Port Register 2 and the State of the Output Port Pins

F.2 Output Port Configuration Registers (OPCR1 and OPCR2)

   +  (% '  % % 2 + %  (%#   & '  ' *(,  % ( 

*'( % Table 22 (%%    '( % * ' *    +  (%

Output Port

+

+

+

+4

+@

+9

+.

+B

+0

+

Alternate Function(s)

-RTSA: I%    * 
  : 7  (%  (% '( < 3 *    

*'( 

-RTSB: I%    * 
 ) : 7  (%  (% '( < 3 *    

*'( 

TXCA_16X Output:
  .8 %(
 '6 7

TXCA_1X Output:
  8 %(
 '6 

RXCA_1X: Output:
  8 '(
 '6 

TXCB_1X Output:
 ) 8 %(
 '6 7

RXCB_1X Output:
 ) 8 '(
 '6 

C/T1_RDY:  
-( &  * 
- D : 7  (%  (%  !( 

3  % %  
-( & 

RXRDY/-FFULL_A Output:
  '( &-$  $('  : 7  (% (%  

!(# '( 3  *    8!H-<<G *'( 

RXRDY/-FFULL_B Output:
 ) '( &-$  $('  : 7  (% (%  

!(# '( 3  *    8!H-<<G) *'( 

-TXRDY_A Output:
  %( & $('   (% (%  !(# '( 3 

*    8!HG *'( 

-TXRDY_B Output:
 ) %( & $('   (% (%  !(# '( 3 

*    8!HG) *'( 

-RTSC: I%    * 

 Note: This output is an Open-Drain, Active Low

signal for the RTS function.

-RTSD7 I%    * 
 ! Note: This output is an Open-Drain, Active Low

signal for the RTS function.

 

B9

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