XR82C684CJ-F Datasheet, PDF (76/107 Pages) Exar Corporation – CMOS Quad Channel UART(QUART)

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.