HT67F60A Datasheet, PDF (47/242 Pages) Holtek Semiconductor Inc – TinyPowerTM A/D Flash MCU with LCD & EEPROM

HT67F60A/HT67F70A
TinyPower^TM A/D Flash MCU with LCD & EEPROM
STATUS Register
Bit
Name
R/W
POR
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
7
6
5
4
3
2
1
0
SC
CZ
TO
PDF
OV
Z
AC
C
R
R
R
R
R/W
R/W
R/W
R/W
x
x
0
0
x
x
x
x
“x”: unknown
SC: The result of the “XOR” operation which is performed by the OV flag and the
MSB of the instruction operation result.
CZ: The the operational result of different flags for different instuctions.
For SUB/SUBM/LSUB/LSUBM instructions, the CZ flag is equal to the Z flag.
For SBC/ SBCM/ LSBC/ LSBCM instructions, the CZ flag is the “AND” operation
result which is performed by the previous operation CZ flag and current operation zero
flag. For other instructions, the CZ flag willl not be affected.
TO: Watchdog Time-out flag
0: After power up ow executing the “CLR WDT” or “HALT” instruction
1: A watchdog time-out occurred
PDF: Power down flag
0: After power up ow executing the “CLR WDT” instruction
1: By executing the “HALT” instructin
OV: Overflow flag
0: No overflow
1: An operation results in a carry into the highest-order bit but not a carry out of the
highest-order bit or vice versa
Z: Zero flag
0: The result of an arithmetic or logical operation is not zero
1: The result of an arithmetic or logical operation is zero
AC: Auxiliary flag
0: No auxiliary carry
1: An operation results in a carry out of the low nibbles, in addition, or no borrow
from the high nibble into the low nibble in substraction
C: Carry flag
0: No carry-out
1: An operation results in a carry during an addition operation or if a borrow does
not take place during a subtraction operation
The “C” flag is also affected by a rotate through carry instruction.
Rev. 1.10
47
December 01, 2016