MITSUBISHI MICROCOMPUTERS
4551 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for
INFRARED REMOTE CONTROL TRANSMITTER
Skip condition
Detailed description
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– Transfers the contents of register B to register A.
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– Transfers the contents of register A to register B.
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– Transfers the contents of register Y to register A.
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– Transfers the contents of register A to register Y.
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– Transfers the contents of registers A and B to register E.
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– Transfers the contents of register E to registers A and B.
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– Transfers the contents of register A to register D.
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– Transfers the contents of register D to register A.
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– Transfers the contents of register Z to register A.
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– Transfers the contents of register X to register A.
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– Transfers the contents of stack pointer (SP) to register A.
Continuous
description
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– Loads the value x in the immediate field to register X, and the value y in the immediate field to register
Y.
When the LXY instructions are continuously coded and executed, only the first LXY instruction is executed
and other LXY instructions coded continuously are skipped.
– Loads the value z in the immediate field to register Z.
(Y) = 0
(Y) = 15
– Adds 1 to the contents of register Y. As a result of addition, when the contents of register Y is 0, the
next instruction is skipped.
– Subtracts 1 from the contents of register Y. As a result of subtraction, when the contents of register Y
is 15, the next instruction is skipped.
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