BS2824 Holtek Semiconductor Inc., BS2824 Datasheet - Page 82

• Manufacturer Part Number: BS2824
• Description: Touch Key Mcu
• Manufacturer: Holtek Semiconductor Inc.

BS2824/BS2854/BS2868
Touch Key MCU
SIZ [m]
Description
Operation
Affected flag(s)
SIZA [m]
Description
Operation
Affected flag(s)
SNZ [m].i
Description
Operation
Affected flag(s)
SUB A,[m]
Description
Operation
Affected flag(s)
SUBM A,[m]
Description
Operation
Affected flag(s)
SUB A,x
Description
Operation
Affected flag(s)
Rev. 1.00
Skip if increment Data Memory is 0
The contents of the specified Data Memory are first incremented by 1. If the result is 0,
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.
[m]
Skip if [m] = 0
None
Skip if increment Data Memory is zero with result in ACC
The contents of the specified Data Memory are first incremented by 1. If the result is 0,
the following instruction is skipped. The result is stored in the Accumulator but the spec-
ified Data Memory contents remain unchanged. 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 instruction.
ACC
Skip if ACC = 0
None
Skip if bit i of Data Memory is not 0
If bit i of the specified Data Memory is not 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 0 the program proceeds with the following instruc-
tion.
Skip if [m].i 0
None
Subtract Data Memory from ACC
The specified Data Memory is subtracted from the contents of the Accumulator. The re-
sult is stored in the Accumulator. Note that if the result of subtraction is negative, the C
flag will be cleared to 0, otherwise if the result is positive or zero, the C flag will be set to
1.
ACC
OV, Z, AC, C
Subtract Data Memory from ACC with result in Data Memory
The specified Data Memory is subtracted from the contents of the Accumulator. The re-
sult is stored in the Data Memory. Note that if the result of subtraction is negative, the C
flag will be cleared to 0, otherwise if the result is positive or zero, the C flag will be set to
1.
[m]
OV, Z, AC, C
Subtract immediate data from ACC
The immediate data specified by the code is subtracted from the contents of the Accumu-
lator. The result is stored in the Accumulator. Note that if the result of subtraction is neg-
ative, the C flag will be cleared to 0, otherwise if the result is positive or zero, the C flag
will be set to 1.
ACC
OV, Z, AC, C
[m] + 1
ACC [m]
[m] + 1
ACC [m]
ACC x
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January 27, 2010