C8051F131R Silicon Labs, C8051F131R Datasheet - Page 322

• Manufacturer Part Number: C8051F131R
• Description: 8-bit Microcontrollers - MCU 128kB 100MIPS 8448B RAM
• Manufacturer: Silicon Labs

Specifications of C8051F131R

• Product Category: 8-bit Microcontrollers - MCU
• Core: 8051
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 100 MHz
• Program Memory Size: 128 KB
• Data Ram Size: 8.25 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 2.7 V to 3.6 V
• Package / Case: TQFP-64
• Mounting Style: SMD/SMT
• A/d Bit Size: 10 bit
• A/d Channels Available: 9
• Data Rom Size: 64 KB
• Interface Type: I2C, SMBus, SPI, UART
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 32
• Number Of Timers: 16 bit
• Processor Series: C8051
• Program Memory Type: Flash
• Factory Pack Quantity: 500
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 3 V

C8051F120/1/2/3/4/5/6/7
C8051F130/1/2/3
322
Note:
Bit7–5:
Bit4–3:
Bit2:
Bit1:
Bit0:
SFR Address: TMR2CF:0xC9;TMR3CF:0xC9;TMR4CF:0xC9
SFR Page TMR2CF: page 0;TMR3CF: page 1;TMR4CF: Page 2
Bit7
-
Reserved.
TnM1 and TnM0: Timer Clock Mode Select Bits.
Bits used to select the Timer clock source. The sources can be the System Clock
(SYSCLK), SYSCLK divided by 2 or 12, or the external clock divided by 8. Clock source is
selected as follows:
00: SYSCLK/12
01: SYSCLK
10: EXTERNAL CLOCK/8 (Synchronized to the System Clock)
11: SYSCLK/2
TOGn: Toggle output state bit.
When timer is used to toggle a port pin, this bit can be used to read the state of the output, or
can be written to in order to force the state of the output (Timer 2 and Timer 4 Only).
TnOE: Timer output enable bit.
This bit enables the timer to output a 50% duty cycle output to the timer’s assigned external
port pin.
NOTE: A timer is configured for Square Wave Output as follows:
CP/RLn = 0
C/Tn
TnOE = 1
Load RCAPnH:RCAPnL (See “Square Wave Frequency (Timer 2 and Timer 4 Only)” on
page 320.)
Configure Port Pin to output squarewave (See
page
0: Output of toggle mode not available at Timers’s assigned port pin.
1: Output of toggle mode available at Timers’s assigned port pin.
DCENn: Decrement Enable Bit.
This bit enables the timer to count up or down as determined by the state of TnEX.
0: Timer will count up, regardless of the state of TnEX.
1: Timer will count up or down depending on the state of TnEX as follows:
Timer 3 and Timer 2 share the T2 and T2EX pins.
SFR Definition 23.9. TMRnCF: Timer 2, 3, and 4 Configuration
235)
Bit6
-
= 0
if TnEX = 0, the timer counts DOWN.
if TnEX = 1, the timer counts UP.
Bit5
-
TnM1
R/W
Bit4
Rev. 1.4
TnM0
R/W
Bit3
Section “18. Port Input/Output” on
TOGn
R/W
Bit2
TnOE
R/W
Bit1
DCENn
R/W
Bit0
00000000
Reset Value