C8051F121 Silicon Laboratories Inc, C8051F121 Datasheet - Page 101

• Manufacturer Part Number: C8051F121
• Description: IC 8051 MCU FLASH 128K 64TQFP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F12xr

Specifications of C8051F121

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 100MHz
• 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: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8.25K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x8b, 8x12b; 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: -

7.3.2. Window Detector In Differential Mode
Figure 7.6 shows two example window comparisons for differential mode, with ADC2LT = 0x10 (+16d) and
ADC2GT = 0xFF (-1d). Notice that in Differential mode, the codes vary from -VREF to VREF*(127/128)
and are represented as 8-bit 2’s complement signed integers. In the left example, an AD2WINT interrupt
will be generated if the ADC2 conversion word (ADC2L) is within the range defined by ADC2GT and
ADC2LT (if 0xFF (-1d) < ADC2 < 0x0F (16d)). In the right example, an AD2WINT interrupt will be gener-
ated if ADC2 is outside of the range defined by ADC2GT and ADC2LT (if ADC2 < 0xFF (-1d) or ADC2 >
0x10 (+16d)).
(AIN2.x - AIN2.y)
REF x (127/128)
REF x (16/128)
REF x (-1/256)
Input Voltage
-REF
Figure 7.6. ADC2 Window Compare Examples, Differential Mode
0x80 (-128d)
0x7F (127d)
0x11 (17d)
0x10 (16d)
0x0F (15d)
0xFF (-1d)
0xFE (-2d)
0x00 (0d)
ADC2
not affected
not affected
AD2WINT
AD2WINT
ADC2GT
ADC2LT
AD2WINT=1
Rev. 1.4
(AIN2.x - AIN2.y)
REF x (127/128)
REF x (16/128)
REF x (-1/256)
C8051F120/1/2/3/4/5/6/7
Input Voltage
-REF
0x80 (-128d)
0x7F (127d)
0x0F (15d)
0x11 (17d)
0x10 (16d)
0xFF (-1d)
0xFE (-2d)
0x00 (0d)
ADC2
C8051F130/1/2/3
not affected
AD2WINT
ADC2GT
ADC2LT
AD2WINT=1
AD2WINT=1
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