HT82K68 Holtek Semiconductor Inc, HT82K68 Datasheet - Page 38

• Manufacturer Part Number: HT82K68
• Description: Multimedia Keyboard Encoder OTP
• Manufacturer: Holtek Semiconductor Inc

SZ [m].i
Description
Operation
Affected flag(s)
TABRDC [m]
Description
Operation
Affected flag(s)
TABRDL [m]
Description
Operation
Affected flag(s)
XOR A,[m]
Description
Operation
Affected flag(s)
Skip if bit ²i² of the data memory is zero
If bit ²i² of the specified data memory is 0, the following instruction, fetched
during the current instruction execution, is discarded and a dummy cycle is
replaced to get the proper instruction (2 cycles). Otherwise proceed with the
next instruction (1 cycle).
Skip if [m].i=0
Move the ROM code (current page) to TBLH and data memory
The low byte of ROM code (current page) addressed by the table pointer
(TBLP) is moved to the specified data memory and the high byte transferred
to TBLH directly.
[m] ¬ ROM code (low byte)
TBLH ¬ ROM code (high byte)
Move the ROM code (last page) to TBLH and data memory
The low byte of ROM code (last page) addressed by the table pointer (TBLP)
is moved to the data memory and the high byte transferred to TBLH directly.
[m] ¬ ROM code (low byte)
TBLH ¬ ROM code (high byte)
Logical XOR accumulator with data memory
Data in the accumulator and the indicated data memory perform a bitwise
logical Exclusive_OR operation and the result is stored in the accumulator.
ACC ¬ ACC ²XOR² [m]
TC2
TC2
TC2
TC2
¾
¾
¾
¾
TC1
TC1
TC1
TC1
¾
¾
¾
¾
TO
TO
TO
TO
¾
¾
¾
¾
Preliminary
PD
PD
PD
PD
¾
¾
¾
¾
38
OV
OV
OV
OV
¾
¾
¾
¾
¾
¾
¾
Z
Z
Z
Z
Ö
AC
AC
AC
AC
¾
¾
¾
¾
¾
¾
¾
¾
C
C
C
C
HT82K68E
August 8, 2000