XR88C681CP Datasheet, PDF(9/99 Page) Exar Corporation – CMOS DUAL CHANNEL UART (DUART)

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XR88C681CP Datasheet, PDF (9/99 Pages) Exar Corporation – CMOS DUAL CHANNEL UART (DUART)

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XR88C681

AC ELECTRICAL CHARACTERISTICS 1, 2, 3

Test Conditions: J >" ; J 6; 6K %% (% %'(+($

Symbol

Parameter

Min.

Reset Timing (See Figure 51)

2

22 ,% B($

XR88C681 Read and Write Cycle Timing (Figure 52)4

1 ( " B

9

8

1 8$ ( + " B

9

( " B 9

8

8$ ( + " B

8(-

B

" B ,% B($

6

;($ + 9

*% ( - + 8(-

( B 8(-

8

8$ ( + B 8(-

6

B

8(- ( * $%

$. B(%6" /

Z-Mode Interrupt Cycle Timing (Figure 53)

#

#2 & ( + #2#

#

# : ( 9>

# 8

# : 8$ ( + 8(-

2#

#2# ( 9

2

#2 & ( + #7 9

Port Timing (Figure 54)4

,

, # (

. 9

,8

, # 8$ ( +

. 8(-

,

, ;($ + B.

8(-

Interrupt Output Timing (Figure 55)

#

#7 ,1 ,> %$

% # % 8(- +4 +

# % % *(% ( #

#, + # %3 (

#

Clock Timing (Figure 56)

9:

5.9: 2! 8(- 9

(

9:

5.9: &% 2!

E '&

Typ.

/

6

Max.

>6

<

1

1

>1>

Unit Conditions

â¢

%

%

%

%

%

%

%

%

%

%

%

%

%

%

%

%

%

%

%

%

%

8I

▷