PDSP16330/A/B

3

PIN DESCRIPTIONS

Symbol

Pin Name and Description

CLK

Clock: Common Clock to device Registers. Register contents change on the rising edge of clock.

Both pins must be connected.

CEX

Clock Enable: Clock Enable for X Port. The clock to the X port is enabled by a low level.

CEY

Clock Enable: Clock Enable for Y Port The clock to the Y port is enabled by a low level.

X15-X0

X Data Input Data presented to this input is loaded into the device by the rising edge of CLK.

X15 is the MSB

Y15-Y0

Y Data Input Data presented to this input is loaded into the device by the rising edge of CLK.

Y15 is the MSB

M15-M0

M Data Output: Magnitude data generated by the device is output on this port. Data changes on

the rising edge of CLK, M15 is the MSB. The weighting of M15 is determined by the Scale factor

selected .

P11-P0

P Data Output: Phase data generated by the device is output on this port. Data changes on the

rising edge of CLK, P11 is the MSB. The weighting of P11 is

π radians.

OEM

Output Enable: Output Enable for M Port. The M Port is in a high impedance state when this input

is high.

OEP

Output Enable: Output Enable for P Port. The P Port is in a high impedance state when this input

is high.

FORM

Format Select This input selects the format of the Cartesian Data input on the X and Y ports.

This input is latched by the rising edge of CLK, and is applied at the same time as the data to

which it refers. A low !evel indicates that two’s complement data is applied, a high indicates

Sign-Magnitude

S1-S0

Scaling Control: Control input for scaling of Magnitude Data. This input is latched by the rising

edge of CLK, and determines the scaling to be applied to the Magnitude result. The Scaling is

applied to the output data in the cycle following the cycle in which the control was latched.

OVR

Overflow: Overflow flag. This signal becomes active if the scaling currently selected causes an

invalid value to be presented to the Magnitude output.

Vcc

+5V supply. All Vcc pins must be connected.

GND

0V supply. All GND pins must be connected.

2's Complement

7FFF

.

.

.

0001

0000

FFFF

.

.

.

8001

Sign Magnitude

7FFF

.

.

.

0001

.

.

.

FFF

0000

8000

INPUT DATA RANGE