Rainbow Electronics MAX1464 - Manual (Page 26)

MAX1464
Low-Power, Low-Noise Multichannel
Sensor Signal Processor
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CPU Cycles required:
1 cycle
Description:
Perform a 16-bit move operation from port-X to the A-
register.
The port-X contents are unchanged.
The previous contents of A-register are overwritten
and lost.
The port-X can be any of the CPU ports.
PC is incremented once to point to the next instruction
in program memory.
Two’s-complement data format is preserved.
No branching occurs.
No other registers are affected.
WRX Write Port X
Op-code: 1110 XXXX BINARY EXh
Operation:
Port-X ← A-register
PC-register
← PC + 1 (point to next instruction)
CPU Cycles required:
1 cycle
Description:
Perform a 16-bit move operation from the A-register to
port-X.
The A-register contents are unchanged.
The previous contents of port-X are overwritten
and lost.
The port-X can be any of the CPU ports.
PC is incremented once to point to the next instruction
in program memory.
Two’s-complement data format is preserved.
No branching occurs.
No other registers are affected.
MLT Multiply
Op-code: 1111 0011 BINARY F3h
Operation:
A-register | M-register
← N-register x M-register
PC-register ← PC + 1 (point to next instruction)
CPU Cycles required:
16 cycles
Description:
Perform a 16-bit by 16-bit arithmetic multiplication of
the M-register and the N-register producing a 32-bit
result. The 32-bit result is stored in two 16-bit registers;
the A-register receives the most significant word of the
result and the M-register receives the least significant
word of the result.
The A-register must be cleared to zero (CLX A) before
executing the MLT instruction. The previous contents of
the A-register are overwritten and lost.
The previous contents of the M-register are overwritten
and lost.
The contents of the N-register are not altered.
The register op code must be 3h.
PC is incremented once to point to the next instruction
in program memory.
Two’s-complement data format is preserved.
No branching occurs.
No other registers are affected.