C8051F131R Silicon Labs, C8051F131R Datasheet - Page 83

• 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

VREF x (1023/1024)
VREF x (511/1024)
VREF x (511/512)
10-bit ADC0 Data Word appears in the ADC0 Data Word Registers as follows:
ADC0H[1:0]:ADC0L[7:0], if AD0LJST = 0
=
ADC0H[7:0]:ADC0L[7:6], if AD0LJST = 1
Example: ADC0 Data Word Conversion Map, AIN0.0 Input in Single-Ended Mode
Example: ADC0 Data Word Conversion Map, AIN0.0-AIN0.1 Differential Input Pair
For AD0LJST = 0:
Code
–VREF x (1/512)
VREF x (1/512)
AIN0.0–AIN0.1
AIN0.0–AGND
–VREF / 2
VREF / 2
VREF / 2
–VREF
(Volts)
(Volts)
=
0
0
(ADC0H[7:2] will be sign-extension of ADC0H.1 for a differential reading, otherwise
000000b).
(ADC0L[5:0] = 00b).
(AMX0CF = 0x00, AMX0SL = 0x00)
(AMX0CF = 0x01, AMX0SL = 0x00)
Vin

Figure 6.5. ADC0 Data Word Example
-------------- -
VREF
Gain
ADC0H:ADC0L
ADC0H:ADC0L
0xFF00 (–256d)
0xFE00 (–512d)
(AD0LJST = 0)
(AD0LJST = 0)
0xFFFF (–1d)

0x03FF
0x01FF
0x0000
0x01FF
0x0000
0x0200
0x0100
0x0001
2
n
; ‘n’ = 10 for Single-Ended; ‘n’= 9 for Differential.
Rev. 1.4
C8051F120/1/2/3/4/5/6/7
ADC0H:ADC0L
ADC0H:ADC0L
(AD0LJST = 1)
(AD0LJST = 1)
0xFFC0
0x7FC0
0xFFC0
0x7FC0
0xC000
0x8000
0x0000
0x4000
0x0040
0x0000
0x8000
C8051F130/1/2/3
83