C8051F023R Silicon Laboratories Inc, C8051F023R Datasheet - Page 114

• Manufacturer Part Number: C8051F023R
• Description: IC 8051 MCU 64K FLASH 64TQFP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F02xr

Specifications of C8051F023R

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 32
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 4.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x8b, 8x10b; D/A 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP, 64-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: 336-1035-2

C8051F020/1/2/3
114
Bit7:
Bit6:
Bit5:
Bits4-3:
Bit2:
Bit1:
Bit0:
R/W
CY
Bit7
CY: Carry Flag.
This bit is set when the last arithmetic operation resulted in a carry (addition) or a borrow (subtrac-
tion). It is cleared to 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 0 by all other arithmetic operations.
F0: User Flag 0.
This is a bit-addressable, general purpose flag for use under software control.
RS1-RS0: Register Bank Select.
These bits select which register bank is used during register accesses.
OV: Overflow Flag.
This bit is set to 1 if the last arithmetic operation resulted in a carry (addition), borrow (subtraction),
or overflow (multiply or divide). It is cleared to 0 by all other arithmetic operations.
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 1 if the sum of the eight bits in the accumulator is odd and cleared if the sum is even.
RS1
0
0
1
1
R/W
AC
Bit6
RS0
0
1
0
1
R/W
Bit5
F0
Figure 12.6. PSW: Program Status Word
Register Bank
RS1
R/W
Bit4
0
1
2
3
Rev. 1.4
RS0
R/W
Bit3
0x08 - 0x0F
0x18 - 0x1F
0x00 - 0x07
0x10 - 0x17
Address
R/W
OV
Bit2
R/W
Bit1
F1
(bit addressable)
PARITY
Bit0
R
SFR Address:
00000000
Reset Value
0xD0