C8051F131R Silicon Labs, C8051F131R Datasheet - Page 315

• 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

Bits 7–0: TL0: Timer 0 Low Byte.
Bits7–5: UNUSED. Read = 000b, Write = don’t care.
Bit4:
Bit3:
Bit2:
Bits1–0: SCA1–SCA0: Timer 0/1 Prescale Bits
R/W
R/W
Bit7
Bit7
-
The TL0 register is the low byte of the 16-bit Timer 0.
T1M: Timer 1 Clock Select.
This select the clock source supplied to Timer 1. T1M is ignored when C/T1 is set to logic 1.
0: Timer 1 uses the clock defined by the prescale bits, SCA1–SCA0.
1: Timer 1 uses the system clock.
T0M: Timer 0 Clock Select.
This bit selects the clock source supplied to Timer 0. T0M is ignored when C/T0 is set to
logic 1.
0: Counter/Timer 0 uses the clock defined by the prescale bits, SCA1-SCA0.
1: Counter/Timer 0 uses the system clock.
UNUSED. Read = 0b, Write = don’t care.
These bits control the division of the clock supplied to Timer 0 and/or Timer 1 if configured
to use prescaled clock inputs.
*Note: External clock divided by 8 is synchronized with the system
SCA1
R/W
R/W
Bit6
Bit6
0
0
1
1
-
clock, and external clock must be less than or equal to the
system clock frequency to operate the timer in this mode.
SFR Definition 23.3. CKCON: Clock Control
SFR Definition 23.4. TL0: Timer 0 Low Byte
SCA0
R/W
R/W
Bit5
Bit5
-
0
1
0
1
T1M
R/W
R/W
Bit4
Bit4
External clock divided by 8*
System clock divided by 12
System clock divided by 48
System clock divided by 4
Prescaled Clock
Rev. 1.4
T0M
R/W
Bit3
R/W
Bit3
C8051F120/1/2/3/4/5/6/7
R/W
Bit2
R/W
Bit2
-
C8051F130/1/2/3
SCA1
R/W
R/W
Bit1
Bit1
SFR Address:
SFR Address:
SFR Page:
SFR Page:
SCA0
R/W
R/W
Bit0
Bit0
0x8A
0
0x8E
0
00000000
Reset Value
00000000
Reset Value
315