C8051F330 Silicon Laboratories Inc, C8051F330 Datasheet - Page 48

• Manufacturer Part Number: C8051F330
• Description: IC 8051 MCU 8K FLASH 20MLP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F33xr

Specifications of C8051F330

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), SPI, UART/USART
• Peripherals: POR, PWM, Temp Sensor, WDT
• Number Of I /o: 17
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 16x10b; D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-QFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

C8051F330/1, C8051F330D
5.4.2. Window Detector In Differential Mode
Figure 5.17 shows two example window comparisons for right-justified, differential data, with
ADC0LTH:ADC0LTL = 0x0040 (+64d) and ADC0GTH:ADC0GTH = 0xFFFF (-1d). In differential mode, the
measurable voltage between the input pins is between -VREF and VREF x (511/512). Output codes are
represented as 10-bit 2’s complement signed integers. In the left example, an AD0WINT interrupt will be
generated if the ADC0 conversion word (ADC0H:ADC0L) is within the range defined by
ADC0GTH:ADC0GTL and ADC0LTH:ADC0LTL (if 0xFFFF (–1d) < ADC0H:ADC0L < 0x0040 (64d)). In the
right example, an AD0WINT interrupt will be generated if the ADC0 conversion word is outside of the range
defined
1d) or ADC0H:ADC0L > 0x0040 (+64d)). Figure 5.18 shows an example using left-justified data with the
same comparison values.
48
VREF x (511/512)
VREF x (511/512)
VREF x (64/512)
VREF x (64/512)
VREF x (-1/512)
VREF x (-1/512)
Input Voltage
Input Voltage
(Px.x - Px.x)
(Px.x - Px.x)
-VREF
-VREF
Figure 5.17. ADC Window Compare Example: Right-Justified Differential Data
by
Figure 5.18. ADC Window Compare Example: Left-Justified Differential Data
ADC0H:ADC0L
ADC0H:ADC0L
0xFFFF
0xFFFE
0x7FC0
0x0FC0
0xFFC0
0x01FF
0x0041
0x0040
0x003F
0x0000
0x0200
0x1040
0x1000
0x0000
0xFF80
0x8000
the
ADC0GT
ADC0GTH:ADC0GTL
ADC0GTH:ADC0GTL
ADC0LTH:ADC0LTL
ADC0LTH:ADC0LTL
not affected
not affected
not affected
not affected
AD0WINT
AD0WINT
AD0WINT
AD0WINT
and
AD0WINT=1
AD0WINT=1
ADC0LT
Rev. 1.2
VREF x (511/512)
VREF x (511/512)
VREF x (64/512)
VREF x (64/512)
VREF x (-1/512)
VREF x (-1/512)
Input Voltage
Input Voltage
(Px.x - Px.x)
(Px.x - Px.y)
-VREF
-VREF
registers
ADC0H:ADC0L
ADC0H:ADC0L
0xFFFF
0xFFFE
0x7FC0
0x0FC0
0xFFC0
0x01FF
0x0041
0x0040
0x003F
0x0000
0x0200
0x1040
0x1000
0x0000
0xFF80
0x8000
(if ADC0H:ADC0L < 0xFFFF (-
ADC0GTH:ADC0GTL
ADC0GTH:ADC0GTL
ADC0LTH:ADC0LTL
ADC0LTH:ADC0LTL
not affected
not affected
AD0WINT
AD0WINT
AD0WINT=1
AD0WINT=1
AD0WINT=1
AD0WINT=1