ADAM24P08 ETC, ADAM24P08 Datasheet - Page 13

• Manufacturer Part Number: ADAM24P08
• Description: Remote Control Transmitter
• Manufacturer: ETC

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ADAM24PXX
2.2.2. Page address register and page buffer register :
2.2.3. Program counter :
2.2.4. Stack register :
(1) writing in the page buffer what page to jump (execution of LPBI) and
(2) execution of BR or CAL, because instruction code is of eight bits so that page
Unlike the program counter, the page address register is usually unchanged so
that the program will repeat on the same page unless a page changing command
is issued. To change the page address, take two steps such as
called in the other page, the page address will be changed at the same time.
are turned off not to update the address. Then, for BR or CAL, address
data are taken in from the instruction operands (a
address is fetched from stack register No. 1.
This stack register provides three stages each for the program counter (6bits),
Address one of pages #0 to #15 in the ROM by the 4-bit binary counter.
In case a return instruction (RTN) is executed within the subroutine that has been
When BR, CAL or RTN instructions are decoded, the switches on each step
counter specifies the next address in random sequence.
the page address register (4bits) and block address (2bits) so that subroutine
nesting can be made on three levels.
reset to the zero location. The PA is also set to `0`. Then the program
This 6-bit binary counter increments for each fetch to address a word in the
currently addressed page having an instruction to be next executed.
For easier programming, at turning on the power, the program counter is
and word can not be specified at the same time.
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0
to a
5
), or for RTN, and
2. Architecture
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