C8051F023R Silicon Laboratories Inc, C8051F023R Datasheet - Page 241

• 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

Bit7:
Bits6-3:
Bit2:
Bit1:
Bit0:
Bits 7-0: TMR3RLL: Timer 3 Reload Register Low Byte.
TF3
R/W
R/W
Bit7
Bit7
TF3: Timer3 Overflow Flag.
Set by hardware when Timer 3 overflows from 0xFFFF to 0x0000. When the Timer 3 interrupt is
enabled, setting this bit causes the CPU to vector to the Timer 3 Interrupt service routine. This bit is
not automatically cleared by hardware and must be cleared by software.
UNUSED. Read = 0000b, Write = don't care.
TR3: Timer 3 Run Control.
This bit enables/disables Timer 3.
0: Timer 3 disabled.
1: Timer 3 enabled.
T3M: Timer 3 Clock Select.
This bit controls the division of the system clock supplied to Counter/Timer 3.
0: Counter/Timer 3 uses the system clock divided by 12.
1: Counter/Timer 3 uses the system clock.
T3XCLK: Timer 3 External Clock Select
This bit selects the external oscillator input divided by 8 as the Timer 3 clock source. When T3XCLK
is logic 1, bit T3M (TMR3CN.1) is ignored.
0: Timer 3 clock source defined by bit T3M (TMR3CN.1).
1: Timer 3 clock source is the external oscillator input divided by 8.
Timer 3 is configured as an auto-reload timer. This register holds the low byte of the reload value.
R/W
R/W
Bit6
Figure 22.21. TMR3RLL: Timer 3 Reload Register Low Byte
Bit6
-
Figure 22.20. TMR3CN: Timer 3 Control Register
R/W
R/W
Bit5
Bit5
-
R/W
R/W
Bit4
Bit4
-
R/W
R/W
Bit3
Bit3
-
Rev. 1.4
TR3
R/W
R/W
Bit2
Bit2
T3M
C8051F020/1/2/3
R/W
R/W
Bit1
Bit1
T3XCLK
R/W
R/W
Bit0
Bit0
SFR Address:
SFR Address:
00000000
00000000
Reset Value
Reset Value
0x91
0x92
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