Intersil Corporation HMA510 Datasheet

April 1997

HMA510

16 x 16-Bit CMOS Parallel

Multiplier Accumulator

Features

• 16 x 16-Bit Parallel Multiplication with Accumulation to a 35-Bit Result

• High-Speed (45ns) Multiply Accumulate Time

• Low Power CMOS Operation

-I

= 500µA Maximum

CCSB

= 7.0mA Maximum at 1.0MHz

CCOP

• HMA510 is Compatible with the CY7C510 and the IDT7210

• Supports Two’s Complement or Unsigned Magnitude Operations

• TTL Compatible Inputs/Outputs

• Three-State Outputs

Ordering Information

TEMP. RANGE

PART NUMBER

HMA510JC-45 0 to 70 68 Ld PLCC N68.95 HMA510JC-55 0 to 70 68 Ld PLCC N68.95 HMA510GC-55 0 to 70 68 Ld CPGA G68.B

(oC) PACKAGE

PKG.

NO.

Description

The HMA510 is a high speed, low power CMOS 16 x 16-bit parallel multiplier accumulator capable of operating at 45ns clocked multiply-accumulate cycles. The 16-bit X and Y operands may be speciﬁed as either two’s complement or unsigned magnitude format. Additional inputs are provided for the accumulator functions which include: loading the accumulator with the current product, adding or subtracting the accumulator contents and the current product, and preloading the Accumulator Registers from the external inputs.

All inputs and outputs are registered. The registers are all positive edge triggered, and are latched on the rising edge of the associated clock signal. The 35-bit Accumulator Output Register is broken into three parts. The 16-bit least signiﬁcant product (LSP), the 16-bit most signiﬁcant product (MSP), and the 3-bit extended product (XTP) Registers. The XTP and MSP Registers have dedicated output ports, while the LSP Register shares the Y-inputs in a multiplexed fashion. The entire 35-bit Accumulator Output Register may be preloaded at any time through the use of the bidirectional output ports and the preloaded control.

Block Diagram

PRELOAD

CLKP

X0-15

CLKY

CLKX

MULTIPLIER ARRAY

ACCUMULATOR

XTP REGISTER MSP REGISTER LSP REGISTER

OEX

OEM

OEL

P32-34

SUB

RND

ACC

P16-31

Y0-15 P0-15

1616

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. http://www.intersil.com or 407-727-9207

3-1

File Number 2806.2

Pinouts

X15

OEL RND SUB ACC

CLKX CLKY

OEX

PREL

OEM

CLKP

P34

X12

X13

X14

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

27 28 29 30 31 32 33

HMA510

68 LEAD PLCC

TOP VIEW

X11

X10X9X8X7X6X5X4X3X2X1X0

123456789

68 67 66 65 64 63 62 61

Y0/P0

Y1/P1

43424140393837363534

Y2/P2

Y3/P3

Y4/P4

Y5/P5

Y6/P6

Y7/P7

GND

Y8/P8

Y9/P9

Y10/P10

Y11/P11

Y12/P12

Y13/P13

Y14/P14

Y15/P15

P16

P33

P32

P31

P30

P29

P28

P27

P26

P25

P24

P23

P22

P21

P20

P19

P17

P18

68 LEAD CPGA

TOP VIEW

X15

X13

X11

N/C

X14

X12

X10

Y0/P0

OEL

RND

SUB

ACC

CLKX

CLKY

OEX

PREL

OEM

CLKP

P34

P33

P32

P30

P28

P26

P24

P22

P20

P18

N/C

P31

P29

P27

P25

P23

P21

P19

N/C

Y1/P1

Y3/P3

Y2/P2

Y4/P4

BA KLCD E F GH J

Y5/P5

Y6/P6

Y7/P7

GND

Y8/P8

Y9/P9

Y10/

P10 P12 P14

Y11/

P11 P13 P15

Y12/

Y13/

Y14/

Y15/

P16

N/C

P17

3-2

Pin Descriptions

PLCC PIN

NAME

NUMBER TYPE DESCRIPTION

HMA510

GND 53, 54 The device ground.

X0-X15 1-10, 63-68 I X-Input Data. These 16 data inputs provide the multiplicand which may be in two's com-

Y0-Y15/

P0-P15

P16-P3 29-44 I/O MSP Output Data. This 16-bit port is used to provide the Most Significant Product Out-

P32-P34 26-28 I/O XTP Output Data. This 3-bit port is used to provide the Extended Product Output (P32-

TC 21 I Two's Complement Control. Input data is interpreted as two's complement when this

ACC 14 I Accumulate Control. When this control is HIGH, the Accumulator Output Register con-

SUB 13 I Subtract Control. When both SUB and ACC are HIGH, the Accumulator Register con-

17-20 The +5V power supply pins. 0.1µF capacitors between the VCC and GND pins are rec-

ommended.

plement or unsigned magnitude format.

45-52, 55-62 I/O Y-Input/LSP Output Data. This 16-bit port is used to provide the multiplier which may

be in two's complement or unsigned magnitude format. It may also be used for output of the Least Significant Product (P0-P15) or for preloading the LSP Register.

put (P16-P31). It may also be used to preload the MSP Register.

P34). It may also be used to preload the XTP Register.

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.

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

tents are subtracted from the current product. When ACC is HIGH and SUB is LOW, the Accumulator Register contents and the current product are summed. The SUB control input is latched on the rising edge of CLKX or CLKY.

RND 12 I Round Control. When this control is HIGH, a one is added to the most significant bit of

the LSP. When LOW, the product is unchanged.

PREL 23 I Preload Control. When this control is HIGH, the three bidirectional ports may be used

to preload the Accumulator Registers. The three-state controls (OEX, OEM, OEL) must be HIGH, and the data will be preloaded on the rising edge of CLKP. When this control is LOW, the Accumulator Registers function in a normal manner.

OEL 11 I Y-Input/LSP Output Port Three-State Control. When OEL is HIGH, the output drivers

are in the high impedance state. This state is required for Y-data input or preloading the LSP Register. When OEL is LOW, the port is enabled for LSP output.

OEM 24 I MSP Output Port Three-State Control. A LOW on this control line enables the port for

output. When OEM is HIGH, the output drivers are in the high impedance state. This control must be HIGH for preloading the MSP Register.

OEX 22 I XTP Output Port Three-State Control. A LOW on this control line enables the port for

output. When OEX is HIGH, the output drivers are in the high impedance state. This control must be HIGH for preloading the XTP Register.

CLKX 15 I X-Register Clock. The rising edge of this clock latches the X-Data Input Register along

with the TC, ACC, SUB and RND inputs.

CLKY 16 I Y-Register Clock. The rising edge of this clock latches the Y-Data Input Register along

with the TC, ACC, SUB and RND inputs.

CLKP 25 I Product Register Clock. The rising edge of CLKP latches the LSP, MSP and XTP Reg-

isters. If the preload control is active, the data on the I/O ports is loaded into these registers. If preload is not active, the accumulated product is loaded into the registers.

3-3

+ 5 hidden pages