XR82C684CJ View Datasheet(PDF) - Exar Corporation

Part Name

Description

MFG CO.

XR82C684CJ

CMOS Quad Channel UART (QUART)

Exar Corporation 

Prev 71 72 73 74 75 76 77 78 79 80 Next

XR82C684

Output Port

+

+

+

+4

+@

+9

Alternate Function(s)

TXCC_1X:

8 %(
 '6 

TXCC_16X:

.8 %(
 '6 7

RXCC_1X:
 ) 8 '(
 '6 

TXCD_1X:
 ! 8 %(
 '6 

RXCD_1X:
 ) 8 '(
 '6 

C/T2_RDY:  
-( &  * 
- D Note: This output is an Open-Drain output

when used as the Counter/Timer Ready Output.

RXRDY/-FFULL_C:

'( &-$  $('  Note: This is an Open-Drain,

Active-low output for the RXRDY/FFULL_C function.

RXRDY/-FFULL_D:
  '( &-$  $('  Note: This is an Open-Drain,

Active-low output for the RXRDY/FFULL_D function.

-TXRDY_C:

%( & $('   (% (%  !(# '( 3  *   

8!HG
*'( 

-TXRDY_D:
 ! %( & $('   (% (%  !(# '( 3  *   

8!HG! *'( 

Note: The “shaded” Output Port pin alternate functions are only available in the 68 pin PLCC package option.

Table 22. Listing of the Alternate Functions for the Output Port

& *    '( % *   ( %  +  (%  %' & 3((,    (    

+
%   ( *  *  % 3 ,(%% *  3%

Bit 7

OP7

 L +PBQ

 L 8!H)

Bit 6

OP6

 L +P.Q

 L 8!H

Bit 5

Bit 4

OP5

OP4

 L +P9Q

 L +P@Q

 L 8!H-<<)  L 8!H-<<

Bit 3

Bit 2

Bit 1

Bit 0

OP3

OP2

 L +P4Q

 L +PQ

 L
- D   L 8
 .8

 L 8
) 8  L 8
 8

 L 8
) 8  L 8
 8

Table 23. Output Port Configuration Register 1 - OPCR1

Bit 7

OP15

 L +PBQ

 L 8!H!

Bit 6

OP14

 L +P.Q

 L 8!H

Bit 5

Bit 4

OP13

OP12

 L +P9Q

 L +P@Q

 L 8!H-<<!  L 8!H-<<

Bit 3

Bit 2

Bit 1

Bit 0

OP11

OP10

 L +P4Q

 L +PQ

 L
- D   L 8

.8

 L 8
! 8  L 8

8

 L 8
! 8  L 8

8

Table 24. Output Port Configuration Register 2 - OPCR2

Note: the OPCRs only addresses the alternate functions for Output Port pins, OP2 - OP7 and OP10 - OP15. OP0, OP1,

OP8 and OP9 assume their RTS roles if either MR1n[7] = 1 or MR2n[5] = 1. Setting those Mode Register bits enables the

RTS function. Otherwise, these two ports will only be General Purpose Output Ports.

 

B.

Share Link: