2-102

Figure 2 - Pin Connections

Pin Description

Pin #

Name

Description

Ground.

2-5

D0i-D3i

Input/Microport Data Bus. This is part of a 16 bit data bus. The data bus is bidirectional in

Connect Memory mode where it is typically interfaced to a microprocessor. In all other

modes the data bus is an input. Data to be switched through the device is clocked in at this

port.

Ground.

7-10

D4i-D7i

Input/Microport Data Bus. See description for pins 2-5 above.

11

Ground.

12-15

D8i-D11i Input/Microport Data Bus. See description for pins 2-5 above.

16

Ground.

17-20

D12i-D15i Input/Microport Data Bus.

See description for pins 2-5 above.

21

Ground.

22

CK

Clock. Master clock input which is used to clock data into and out of the device. It also clocks

the internal 11 bit counter.

23

+5V supply input.

24

Ground.

25,26

IC

27

FP

Frame Pulse. An active low signal that serves as a synchronous clear for the internal 11 bit

counter in all modes except Shift Register mode. The counter is cleared on a rising edge of

CK. In the Shift Register mode, FP serves to align channel boundaries.

74

56

58

60

62

64

68

70

72

66

12

28

26

24

22

18

16

14

20

32

30

54

VSS

D7o

D6o

D5o

D4o

VSS

D3o

D2o

D1o

D0o

VSS

CD

A14

A13

A12

A11

A10

A9

A8

D8i

D9i

D10i

D11i

D13i

D14i

D15i

VSS

VSS

IC

CK

VDD

IC

FP

CS

DS

R/W

DTA

NC

84 PIN PLCC

VDD

A15

VSS

D12i