ak7712a-vt AKM Semiconductor, Inc., ak7712a-vt Datasheet - Page 28

• Manufacturer Part Number: ak7712a-vt
• Description: Built-in 20-bit Adc/dac Sophisticated Audio Dsp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
2) Multiplier
Multiplier outputs the 31-bit data for shift circuit as a result of fixed-point calculation(24-bit(data) 16-bit(coefficient)
= 40-bit). 4 ways of multiplication can operate for the data as follows. The output data is extended from MSB for
reason that the data overflows at -1
0180-E-02
Multiplication actions always synchronous with CMCK, the product is output in 2 cycles.
Coefficient RAM
Coefficient RAM
16-bit Input
DBUS
DBUS
24-bit Input
Data RAM
Data RAM
-1. The following combinations are possible for input.
DBUS
DBUS
16-bit
Partial Product
Carry
Final Adder
X
Shifter
40-bit
24-bit
calculation of X
Sum
- 28 -
Y
notes
Input Register
Partial Product Register
2
[AK7712A-VT]
1997/12