TMC2246 Fairchild Semiconductor, TMC2246 Datasheet - Page 2

• Manufacturer Part Number: TMC2246
• Description: Image Filter 11 x 10 bit/ 60 MHz
• Manufacturer: Fairchild Semiconductor

PRODUCT SPECIFICATION
Block Diagram
Functional Description
The TMC2246A Image Filter is a flexible multiplier-summer
array which computes the accumulated sum of four 11x10
bit products, allowing word growth up to 25 bits.
The inputs are user-configurable, allowing latching of either
the 10- or 11-bit input data. The data format is user-selectable
between integer or fractional two’s complement arithmetic.
Total latency from input registers to output data port is 5
clocks.
2
ENSEL
OCEN
FSEL
OEN
ACC
CLK
D1 9-0
C1 10-0
ENB1
D2 9-0
*
C2 10-0
2 -10
ENB2
LSB
S 15-0
The output data path is 16 bits wide, providing the lower 16
bits of the accumulator when in integer format or the upper
16 bits of the 25-bit accumulator path when fractional two’s
complement notation is selected. One-time rounding to 16
bits is performed automatically when accumulating frac-
tional data, but is disabled when operating in integer format
to maintain the integrity of the least-significant bits.
MSB
D3 9-0
25
C3 10-0
*Automatic rounding function
ENB3
D4 9-0
C4 10-0
ENB4
REV. 1.0.3 9/11/00
TMC2246A