TSC80251 TEMIC [TEMIC Semiconductors], TSC80251 Datasheet - Page 82

• Manufacturer Part Number: TSC80251
• Manufacturer: TEMIC [TEMIC Semiconductors]

Rev. C – May 7, 1999
ACALL <addr11>
Function:
Absolute call
Description:
Unconditionally calls a subroutine at the specified address. The instruction increments the 3–byte PC twice to obtain
the address of the following instruction, then pushes bytes 0 and 1 of the result onto the stack (byte 0 first) and
increments the stack pointer twice. The destination address is obtained by successively concatenating bits 15-11 of the
incremented PC, opcode bits 7-5, and the second byte of the instruction. The subroutine called must therefore start
within the same 2–Kbyte “page” of the program memory as the first byte of the instruction following ACALL.
Example :
The stack pointer (SP) contains 07h and the label ”SUBRTN” is at program memory location 0345h. After executing
the instruction ACALL SUBRTN at location 0123h, SP contains 09h; on–chip RAM locations 09h and 08h contain
01h and 25h, respectively; and the PC contains 0345h.
[Encoding]
FLAGS :
Hex Code in:
Binary Mode = [Encoding]
Source Mode = [Encoding]
a10 | a9 | a8 | 1
CY
_
1
AC
_
addr7–addr4
addr3–addr0
OV
_
Operation:
ACALL
(PC)
(SP)
((SP))
(SP)
((SP))
(PC.10:0)
(SP) + 1
(SP) + 1
(PC) + 2
(PC.7:0)
(PC.15:8)
page address
N
_
TSC80251
Z
_
5.37