TSC80251 TEMIC [TEMIC Semiconductors], TSC80251 Datasheet - Page 211

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

5.166
TSC80251
XCHD A,@Ri
Function:
Exchange digit
Description:
Exchanges the low nibble of the accumulator (bits 3–0) generally representing a Hexadecimal or BCD digit, with that
of the on–chip RAM location indirectly addressed by the specified register. Does not affect the high nibble (bits 7–4)
of either register.
Example :
R0 contains the address 20h, the accumulator contains 36h (00110110B), and on–chip RAM location 20h contains 75h
(01110101B). After executing the instruction, XCHD A,@R0 on–chip RAM location 20h contains 76h (01110110B)
and 35h (00110101B) in the accumulator.
[Encoding]
FLAGS :
Hex Code in:
Binary Mode = [Encoding]
Source Mode = [A5][Encoding]
1101
CY
_
011i
AC
_
OV
_
Operation:
XCHD
(A).3:0
((Ri)).3:0
N
_
Rev. C – May 7, 1999
Z
_