7480 Datasheet, PDF (52/98 Pages) Bi technologies – 7/8 Diameter 5-Turn Wirewound Precision Potentiometer

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MITSUBISHI MICROCOMPUTERS
7480/7481 GROUP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
ADDRESSING MODES
The 7480/7481 group has strong accessability, because it has 17
kinds of addressing modes. For details, refer to the 740 family ad-
dressing modes.
MACHINE-LANGUAGE INSTRUCTIONS
The 7480/7481 group has 71 machine-language instructions. For
details, refer to the 740 family machine-language instruction list.
NOTES ON PROGRAMMING
(1) The frequency division ratio of the timer is 1/(n+1).
n: Timer setting value
However, n = 0 – 255 (for timer 1, timer 2)
n = 0 – 65535 (timer X, timer Y)
(2) The contents of the interrupt request bits can be changed by
software, but the values will not change immediately after be-
ing overwritten.
After changing the value of the interrupt request bits, execute
at least one instruction before executing a the BBC or BBS in-
struction.
(3) To calculate in decimal notation, set the decimal mode flag (D)
to “1”. After executing the ADC or SBC instruction, execute
another instruction before executing the SEC, CLC, or CLD in-
struction.
(4) A NOP instruction should be executed after every PLP instruc-
tion.
(5) Do not execute the STP instruction during A-D conversion.
(6) Multiplication and Division Instructions
The index X mode (T) and the decimal mode (D) flags do not
affect the MUL and DIV instructions.
The execution of these instructions does not change the con-
tents of the processor status register.
DATA REQUIRED FOR MASK ORDERING
Please submit the following data when placing mask orders.
(1) Mask ROM confirmation form
(2) Mark specification form
(3) ROM data .......................................................... EPROM 3 sets
DATA REQUIRED FOR ROM WRITING
ORDERING
Please submit the following data when placing ROM writing or-
ders.
(1) ROM writing confirmation form
(2) Mark specification form
(3) ROM data .......................................................... EPROM 3 sets
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