TSS400-S2

µPOWER PROGRAMMABLE HIGH-PRECISION

SENSOR SIGNAL PROCESSOR

SLMS002 – D4101, OCTOBER 1993

2

POST OFFICE BOX 655303

S4

S5

S6

S7

S8

S9

S10

S11

S12

S13

S14

39

38

37

36

35

34

33

32

31

30

29

18 19

7

8

9

10

11

12

13

14

15

16

17

Ri

A4

K2

A3

A2

K4

A1

K8

AGND

TOSCOUT

TOSCIN

20 21 22 23

FN PACKAGE

(TOP VIEW)

54

3

2

1

644

42 41 40

43

24 25 26 27 28

Terminal Functions

PIN

I/O

DESCRIPTION

NAME

NUMBER

I/O

DESCRIPTION

A1, A2, A3, A4

13, 11, 10, 8

I

Analog inputs for the ADC

AGND

15

Analog ground

COM1, COM2,

COM3, COM4

28, 27,

43, 44

O

LCD commons

I/O

20

I/O

Communication input / output

INITN

3

I

Initialization. INITN is normally tied to VDD and held high. If INITN is held low for more than 10 µs,

the TSS400-S2 begins a warm start.

K1, K2, K4, K8

5, 9, 12, 14

I/O

4-bit programmable parallel input / output port

KC

2

Test. This terminal must be tied to VSS during normal operation.

R0†

18

O

Controls the EEPROM clock

R1, R2, R3, R4,

R5, R6

19, 21 – 25

O

Digital outputs

R7†

26

O

Controls EEPROM power switch

Ri

7

Current source (programming resistor connection)

S1 – S14

42 – 29

O

LCD segments

SVDD

6

Switchable VDD

TOSCIN

17

I

Oscillator input. TOSCIN is the input connection for the crystal oscillator ( 32.768 kHz ).

TOSCOUT

16

O

Oscillator output. TOSCOUT is the output connection for the crystal oscillator ( 32.768 kHz ).

VDD

4

Power supply

VSS

1

Ground

† Not directly accessible by the user’s program