C8051F040 Silicon Laboratories Inc, C8051F040 Datasheet - Page 102

• Manufacturer Part Number: C8051F040
• Description: IC 8051 MCU 64K FLASH 100TQFP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F04xr

Specifications of C8051F040

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: CAN, EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 64
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 4.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x8b, 13x12b; D/A 2x10b, 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

C8051F040/1/2/3/4/5/6/7
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 x (127/128)
and are represented as 8-bit 2s 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)).
102
REF x (127/128)
REF x (16/128)
REF x (-1/256)
Input Voltage
(P1.x - P1.y)
-REF
Figure 7.6. ADC Window Compare Examples, Differential Mode
0x80 (-128d)
0x7F (127d)
0x0F (15d)
0x11 (17d)
0x10 (16d)
0xFF (-1d)
0xFE (-2d)
0x00 (0d)
ADC2
not affected
not affected
AD2WINT
AD2WINT
ADC2GT
ADC2LT
AD2WINT=1
Rev. 1.5
REF x (127/128)
REF x (16/128)
REF x (-1/256)
Input Voltage
(P1.x - P1.y)
-REF
0x80 (-128d)
0x7F (127d)
0x11 (17d)
0x10 (16d)
0x0F (15d)
0xFF (-1d)
0xFE (-2d)
0x00 (0d)
ADC2
not affected
AD2WINT
ADC2GT
ADC2LT
AD2WINT=1
AD2WINT=1