TSC80251 TEMIC [TEMIC Semiconductors], TSC80251 Datasheet - Page 146

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

Rev. C – May 7, 1999
LCALL <dest>
Function:
Long call
Description:
Calls a subroutine located at the specified address. The instruction adds three to the program counter to generate the
address of the next instruction and then PUSHes the 16–bit result onto the stack (low byte first). The stack pointer is
incremented by two. The high and low bytes of the PC are then loaded, respectively, with the second and third bytes
of the LCALL instruction. Program execution continues with the instruction at this address. The subroutine may
therefore begin anywhere in the 64–Kbyte region of memory where the next instruction is located.
Example :
The stack pointer contains 07h and the label ”SUBRTN” is assigned to program memory location 1234h. After
executing the instruction LCALL SUBRTN at location 0123h, the stack pointer contains 09h, on–chip RAM locations
08h and 09h contain 01h and 26h and the PC contains 1234h.
LCALL addr16
[Encoding]
LCALL @WRj
[Encoding]
FLAGS :
Hex Code in:
Binary Mode = [Encoding]
Source Mode = [Encoding]
Hex Code in:
Binary Mode = [A5][Encoding]
Source Mode = [Encoding]
0001
1001
CY
_
0010
1001
AC
_
addr15-addr8
tttt
addr7-addr0
OV
_
0100
Operation:
LCALL
(PC)
(SP)
((SP))
(SP)
((SP))
(PC)
Operation:
LCALL
(PC)
(SP)
((SP))
(SP)
((SP))
(PC)
(SP) + 1
(SP) + 1
(SP) + 1
(SP) + 1
(PC) + 3
(addr.15:0)
(PC) + 3
((WRj))
(PC.7:0)
(PC.15:8)
(PC.7:0)
(PC.15:8)
N
_
TSC80251
Z
_
5.101