HT68F14 HOLTEK [Holtek Semiconductor Inc], HT68F14 Datasheet - Page 26

• Manufacturer Part Number: HT68F14
• Description: Enhanced I/O Flash Type MCU
• Manufacturer: HOLTEK [Holtek Semiconductor Inc]

Rev. 1.10
Bit 7, 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Name
POR
R/W
Bit
STATUS Register
·
·
In addition, on entering an interrupt sequence or executing a subroutine call, the status register will not
be pushed onto the stack automatically. If the contents of the status registers are important and if the
subroutine can corrupt the status register, precautions must be taken to correctly save it.
PDF is cleared by a system power-up or executing the ²CLR WDT² instruction. PDF is set by
executing the ²HALT² instruction.
TO is cleared by a system power-up or executing the ²CLR WDT² or ²HALT² instruction. TO is set
by a WDT time-out.
Unimplemented, read as ²0²
TO: Watchdog Time-Out flag
PDF: Power down flag
OV: Overflow flag
Z: Zero flag
AC: Auxiliary flag
C: Carry flag
C is also affected by a rotate through carry instruction.
0: After power up or executing the ²CLR WDT² or ²HALT² instruction
1: A watchdog time-out occurred.
0: After power up or executing the ²CLR WDT² instruction
1: By executing the ²HALT² instruction
0: no overflow
1: an operation results in a carry into the highest-order bit but not a carry out of the
0: The result of an arithmetic or logical operation is not zero
1: The result of an arithmetic or logical operation is zero
0: no auxiliary carry
1: an operation results in a carry out of the low nibbles in addition, or no borrow from the
0: no carry-out
1: an operation results in a carry during an addition operation or if a borrow does not take place
¾
¾
¾
7
high nibble into the low nibble in subtraction
highest-order bit or vice versa.
during a subtraction operation
¾
¾
¾
6
TO
R
5
0
26
PDF
R
4
0
Enhanced I/O Flash Type MCU
HT68F13/HT68F14/HT68F15
R/W
OV
3
x
R/W
Z
2
x
R/W
AC
1
x
February 9, 2011
²x² unknown
R/W
C
0
x