Maxim Integrated MAX31782 - Manual (Page 120)

MaximIntegrated 14-5
MAX31782 User’s Guide
Revision 0; 8/11
Table14-2.HardwareMultiplierRegisters
14.5HardwareMultiplierPeripheralRegisters
The hardware multiplier registers are detailed in the following sections . Addresses of registers are given as “Mx[yy],”
where x is the module number (from 0 to 5 decimal) and yy is the register index (from 00h to 1Fh hexadecimal) .
REGISTER ADDRESS FUNCTION
MCNT M5[00h]
Multiplier Control Register . Selects operation, data type, operand count, hardware square
function, and write option on the MC register . Also contains the overflow flag and the clear
control for operand registers and accumulator .
MA M5[01h]
Multiplier Operand A Register . Used by the user software to load one of the 16-bit values for a
hardware multiplier operation .
MB M5[02h]
Multiplier Operand B Register . Used by the user software to load one of the 16-bit values for a
hardware multiplier operation .
MC2 M5[03h]
Multiplier Accumulate Register 2 . Contains the two most significant bytes of the accumulator
register . The 48-bit accumulator is formed by MC2, MC1, and MC0 . The most significant bit of
this register is the signed bit for signed operations .
MC1 M5[04h]
Multiplier Accumulate Register 1 . Contains bytes 3 and 2 of the accumulator register . The 48-bit
accumulator is formed by MC2, MC1, and MC0 .
MC0 M5[05h]
Multiplier Accumulate Register 0 . Contains the two least significant bytes of the accumulator
register . The 48-bit accumulator is formed by MC2, MC1, and MC0 .
MC1R M5[06h]
Multiplier Read Register 1 . Contains bytes 1 and 0 result from the last operation when MCW bit
is 1 or the last operation is either multiply-only or multiply-negate . The contents of this register
remain until an SFR related to the multiplier has been changed .
MC0R M5[07h]
Multiplier Read Register 0 . Contains bytes 3 and 2 result from the last operation when MCW bit
is 1 or the last operation is either multiply-only or multiply-negate . The contents of this register
remain unchanged until an SFR related to the multiplier has been changed .