3-11

Pinout

68 LEAD CPGA

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Pin Descriptions

NAME

TYPE

DESCRIPTION

The +5V power supply pins. 0.1

GND

The device ground.

X0-X15

I

X-Input Data. These 16 data inputs provide the multiplicand which may be in two's complement or

unsigned magnitude format.

Y0-Y15/P0-P15

I/O

Y-Input/LSP Output Data. This 16-bit port is used to provide the multiplier which may be in two's com-

plement or unsigned magnitude format. It may also be used for output of the least significant product

(P0-P15) or for preloading the LSP Register.

P16-P3

I/O

MSP Output Data. This 16-bit port is used to provide the most significant product output (P16-P31).

It may also be used to preload the MSP Register.

P32-P34

I/O

XTP Output Data. This 3-bit port is used to provide the extended product output (P32-P34). It may

also be used to preload the XTP Register.

TC

I

Two's Complement Control. Input data is interpreted as two's complement when this control is HIGH.

A LOW indicates the data is to be interpreted as unsigned magnitude format. This control is latched

on the rising edge of CLKX or CLKY.

ACC

I

Accumulate Control. When this control is HIGH, the Accumulator Output Register contents are added

to or subtracted from the current product, and the result is stored back into the Accumulator Output

Register.

When LOW, the product is loaded into the Accumulator Output Register overwriting the current con-

tents. This control is also latched on the rising edge of CLKX or CLKY.

11

10

9

8

7

6

5

4

3

2

1

N/C

X14

X12

X10

X8

X6

X4

X2

X0

Y1/P1

Y2/P2

X13

X11

X9

X7

X5

X3

X1

Y0/P0

N/C

P33

P32

P30

P28

P26

P24

P22

P20

P18

P16

N/C

N/C

P31

P29

P27

P25

P23

P21

P19

P17

X15

OEL

Y3/P3

Y4/P4

RND

SUB

Y5/P5

Y6/P6

ACC

CLKX

Y7/P7

GND

CLKY

Y8/P8

Y9/P9

TC

OEX

Y10/

Y11/

PREL

OEM

Y12/

Y13/

CLKP

P34

Y14/

Y15/

B

A

KL

CD

E

F

G

H

J

P10

P12

P14

P11

P13

P15

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HMA510/883