Holtek HT46R22, Handbook

Page: 108 / 162

SZ [m] Skip if Data Memory is 0
Description If the contents of the specified Data Memory is 0, the following instruction is skipped. As
this requires the insertion of a dummy instruction while the next instruction is fetched, it is a
two cycle instruction. If the result is not 0 the program proceeds with the following instruc-
tion.
Operation Skip if [m] = 0
Affected flag(s) None
SZA [m] Skip if Data Memory is 0 with data movement to ACC
Description The contents of the specified Data Memory are copied to the Accumulator. If the value is
zero, the following instruction is skipped. As this requires the insertion of a dummy instruc-
tion while the next instruction is fetched, it is a two cycle instruction. If the result is not 0 the
program proceeds with the following instruction.
Operation
ACC
¬
[m]
Skip if [m] = 0
Affected flag(s) None
SZ [m].i Skip if bit i of Data Memory is 0
Description If bit i of the specified Data Memory is 0, the following instruction is skipped. As this re-
quires the insertion of a dummy instruction while the next instruction is fetched, it is a two
cycle instruction. If the result is not 0, the program proceeds with the following instruction.
Operation Skip if [m].i = 0
Affected flag(s) None
TABRDC [m] Read table (current page) to TBLH and Data Memory
Description The low byte of the program code (current page) addressed by the table pointer (TBLP) is
moved to the specified Data Memory and the high byte moved to TBLH.
Operation
[m]
¬
program code (low byte)
TBLH
¬
program code (high byte)
Affected flag(s) None
TABRDL [m] Read table (last page) to TBLH and Data Memory
Description The low byte of the program code (last page) addressed by the table pointer (TBLP) is
moved to the specified Data Memory and the high byte moved to TBLH.
Operation
[m]
¬
program code (low byte)
TBLH
¬
program code (high byte)
Affected flag(s) None
Chapter 3 Instruction Definition
99