C8051F131R Silicon Labs, C8051F131R Datasheet - Page 31

• 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

1.4.
The C8051F120/1/2/3 and C8051F130/1/2/3 devices include a multiply and accumulate engine which can
be used to speed up many mathematical operations. MAC0 contains a 16-by-16 bit multiplier and a 40-bit
adder, which can perform integer or fractional multiply-accumulate and multiply operations on signed input
values in two SYSCLK cycles. A rounding engine provides a rounded 16-bit fractional result after an addi-
tional (third) SYSCLK cycle. MAC0 also contains a 1-bit arithmetic shifter that will left or right-shift the con-
tents of the 40-bit accumulator in a single SYSCLK cycle.
16 x 16 MAC (Multiply and Accumulate) Engine
MAC0OVR
1 bit Shift
MAC0CF
MAC0AH
MAC0 A Register
MAC0FM
MAC0ACC3
Figure 1.10. MAC0 Block Diagram
MAC0AL
MAC0RNDH
16 x 16 Multiply
MAC0 Rounding Register
MAC0 Accumulator
Rounding Engine
MAC0ACC2
40 bit Add
Rev. 1.4
MAC0BH
MAC0 B Register
MAC0RNDL
C8051F120/1/2/3/4/5/6/7
MAC0ACC1
MAC0BL
C8051F130/1/2/3
1
0
MAC0MS
MAC0STA
Flag Logic
0
MAC0ACC0
31