XR82C684CJ-F Datasheet, PDF (98/107 Pages) Exar Corporation – CMOS Quad Channel UART(QUART)

XR82C684
Bit 7
Input Port
Change
 L **
 L 
Bit 6
Delta Break
D
 L **
 L 
Bit 5
RXRDY/
FFULLD
 L **
 L 
Bit 4
TXRDYD
 L **
 L 
Bit 3
Counter #2
Ready
 L **
 L 
Bit 2
Delta Break
C
 L **
 L 
Bit 1
RXRDY/
FFULLC
 L **
 L 
Table 42. Interrupt Mask Register 2, IMR2
Bit 0
TXRDYC
 L **
 L 
Bit 7

-9
Bit 6

-@
Bit 5

-4
Bit 4

-
Bit 3

-
Bit 2

-
Bit 1

-
Table 43. Counter/Timer Upper Byte Register, CTUR (applies to CTUR1 and CTUR2)
Bit 0

-0
Bit 7

-B
Bit 6

-.
Bit 5

-9
Bit 4

-@
Bit 3

-4
Bit 2

-
Bit 1

-
Table 44. Counter/Timer Lower Byte Register, CTLR (applies to CTLR1 and CTLR2)
Bit 0

-
Bit 7
$>B
Bit 6
$>.
Bit 5
$>9
Bit 4
$>@
Bit 3
$>4
Bit 2
$>
Bit 1
$>
Table 45. Interrupt Vector Register: IVR (applies to IVR1 and IVR2)
K. Timing Diagrams
Bit 0
$>
@>
>
0>
% <%
>
0>
Figure 55. Input and Output Levels for Timing Measurements
Note: AC testing inputs are driven at 0.4V for a logic “0” and 2.4V for a logic “1” except for -40 to 85
C and -55 to 125
C,
logic “1” shall be 2.6V. Timing measurements are made at 0.8V for a logic “0” and 2.0V for a logic “1”.
 
0