LAPIS Semiconductor ML62Q1000 Series, User Manual, Page: 120 / 882

ML62Q1000 Series User's Manual
Chapter 2 CPU and Memory Space
FEUL62Q1000 2-8
As soon as the data is written in register CR7, operation is started.
In a saturating multiply-accumulate operation, the result is fixed to 0x7FFF_FFFF for a positive number and 0x8000_0000
for a negative number when it is out of the expressible range.
[Note]
Ÿ
"-" indicates that the previous value is retained.
Ÿ
In a signed operation, each of the most significant bits of input and output is a sign.
Quad word symbol CQR0
Double word symbol CXR4 CXR0
Word symbol CER6 CER4 CER2 CER0
Byte symbol CR7 CR6 CR5 CR4 CR3 CR2 CR1 CR0
Multiplication
16 bit x 16 bit
Input
Multiplicand
[15:0]
Multiplier [15:0] -
Result - - Product [31:0]
Division
32 bit/16 bit
Input Divisor [15:0] - Dividend [31:0]
Result - Remainder [15:0] Quotient [31:0]
Division
32 bit/32 bit
Input Divisor [31:0] Dividend [31:0]
Result Remainder [31:0] Quotient [31:0]
Multiply-accumulate
(non-saturating)
16 bit x 16bit+32 bit
Input
Multiplicand
[15:0]
Multiplier [15:0] Addend [31:0]
Result - - Multiply-accumulate [31:0]
Multiply-accumulate
(saturating)
16 bit x 16bit+32 bit
Input
Multiplicand
[15:0]
Multiplier [15:0] Addend [31:0]
Result - - Multiply-accumulate [31:0]