C8051F310-TB Silicon Laboratories Inc, C8051F310-TB Datasheet - Page 92
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C8051F310-TB
Manufacturer Part Number
C8051F310-TB
Description
BOARD PROTOTYPING W/C8051F310
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F310-TB
Contents
Board
Processor To Be Evaluated
C8051F31x
Interface Type
USB
Silicon Manufacturer
Silicon Labs
Core Architecture
8051
Silicon Core Number
C8051F310
Silicon Family Name
C8051F31x
Kit Contents
Board
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
C8051F310
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
- Current page: 92 of 228
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C8051F310/1/2/3/4/5/6/7
92
Bit7:
Bit6:
Bit5:
Bits4–3: RS1–RS0: Register Bank Select.
Bit2:
Bit1:
Bit0:
Bits7–0: ACC: Accumulator.
ACC.7
R/W
R/W
CY
Bit7
Bit7
CY: Carry Flag.
This bit is set when the last arithmetic operation resulted in a carry (addition) or a borrow
(subtraction). It is cleared to logic 0 by all other arithmetic operations.
AC: Auxiliary Carry Flag
This bit is set when the last arithmetic operation resulted in a carry into (addition) or a borrow
from (subtraction) the high order nibble. It is cleared to logic 0 by all other arithmetic opera-
tions.
F0: User Flag 0.
This is a bit-addressable, general purpose flag for use under software control.
These bits select which register bank is used during register accesses.
OV: Overflow Flag.
This bit is set to 1 under the following circumstances: an ADD, ADDC, or SUBB instruction
causes a sign-change overflow, a MUL instruction results in an overflow (result is greater
than 255), or a DIV instruction causes a divide-by-zero condition. The OV bit is cleared to 0
by the ADD, ADDC, SUBB, MUL, and DIV instructions in all other cases.
F1: User Flag 1.
This is a bit-addressable, general purpose flag for use under software control.
PARITY: Parity Flag.
This bit is set to logic 1 if the sum of the eight bits in the accumulator is odd and cleared if the
sum is even.
This register is the accumulator for arithmetic operations.
RS1
ACC.6
0
0
1
1
R/W
R/W
AC
Bit6
Bit6
SFR Definition 8.4. PSW: Program Status Word
RS0
0
1
0
1
ACC.5
R/W
SFR Definition 8.5. ACC: Accumulator
R/W
Bit5
Bit5
F0
Register Bank
ACC.4
RS1
R/W
R/W
Bit4
Bit4
0
1
2
3
Rev. 1.7
ACC.3
RS0
R/W
R/W
Bit3
Bit3
0x00–0x07
0x08–0x0F
0x10–0x17
0x18–0x1F
Address
ACC.2
R/W
R/W
OV
Bit2
Bit2
ACC.1
R/W
R/W
Bit1
Bit1
F1
(bit addressable)
(bit addressable)
PARITY
ACC.0
R/W
Bit0
Bit0
R
SFR Address:
SFR Address:
00000000
Reset Value
00000000
Reset Value
0xD0
0xE0
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