SN8F27E64LKB datasheet(30/192 Pages) SONIX

30 / 192 page

SN8F27E60 Series

8-Bit Flash Micro-Controller with Embedded ICE and ISP

SONiX TECHNOLOGY CO., LTD

Page 30

Version 1.4

2.2.3 PROGRAM FLAG

The PFLAG register contains the arithmetic status of ALU operation, system reset status and LVD detecting status.

POR, WDT, and RST bits indicate system reset status including power on reset, LVD reset, reset by external pin active

and watchdog reset. C, DC, Z bits indicate the result status of ALU operation. LVD24, LVD33 bits indicate LVD

detecting power voltage status.

086H

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

PFLAG

POR

WDT

RST

STKOV

Read/Write

R/W

After Reset

Bit 7

POR: Power on reset and LVD brown-out reset indicator.

0 = Non-active.

1 = Reset active. LVD announces reset flag.

Bit 6

WDT: Watchdog reset indicator.

0 = Non-active.

1 = Reset active. Watchdog announces reset flag.

Bit 5

RST: External reset indicator.

0 = Non-active.

1 = Reset active. External reset announces reset flag.

Bit 4

STKOV: Stack overflow indicator.

0 = Non-overflow.

1 = Stack overflow.

Bit 2

C: Carry flag

1 = Addition with carry, subtraction without borrowing,

rotation with shifting out logic “1”, comparison

result

≥ 0.

0 = Addition without carry, subtraction with borrowing signal,

rotation with shifting out logic “0”, comparison

result < 0.

Bit 1

DC: Decimal carry flag

1 = Addition with carry from low nibble, subtraction without borrow from high nibble.

0 = Addition without carry from low nibble, subtraction with borrow from high nibble.

Bit 0

Z: Zero flag

1 = The result of an arithmetic/logic/branch operation is zero.

0 = The result of an arithmetic/logic/branch operation is not zero.

0EFH

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

STKP

GIE

LVD24

LVD33

STKPB2

STKPB1

STKPB0

Read/Write

R/W

After Reset

Bit 6

LVD24: LVD24 low voltage detect indicator.

0 = Vdd > LVD24 detect level.

1 = Vdd < LVD24 detect level.

Bit 5

LVD33: LVD33 low voltage detect indicator.

0 = Vdd > LVD33 detect level.

1 = Vdd < LVD33 detect level.



Note: Refer to instruction set table for detailed information of C, DC and Z flags.

SN8F27E64LKB Datasheet(PDF) 30 Page - SONiX Technology Company

SN8F27E64LKB Datasheet(HTML) 30 Page - SONiX Technology Company

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL