C8051F045R Silicon Labs, C8051F045R Datasheet - Page 100

• Manufacturer Part Number: C8051F045R
• Description: 8-bit Microcontrollers - MCU 25 MIPS 64KB 10ADC
• Manufacturer: Silicon Labs

Specifications of C8051F045R

• Product Category: 8-bit Microcontrollers - MCU
• Core: 8051
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 25 MHz
• Program Memory Size: 64 KB
• Data Ram Size: 4.25 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: 13
• Data Rom Size: 64 KB
• Interface Type: CAN, 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: 2.7 V

C8051F040/1/2/3/4/5/6/7
7.3.
The ADC2 Programmable Window Detector continuously compares the ADC2 output to user-programmed
limits, and notifies the system when an out-of-bound condition is detected. This is especially effective in an
interrupt-driven system, saving code space and CPU bandwidth while delivering faster system response
times. The window detector interrupt flag (AD2WINT in ADC2CN) can also be used in polled mode. The
reference words are loaded into the ADC2 Greater-Than and ADC2 Less-Than registers (ADC2GT and
ADC2LT). Notice that the window detector flag can be asserted when the measured data is inside or out-
side the user-programmed limits, depending on the programming of the ADC2GT and ADC2LT registers.
7.3.1. Window Detector in Single-Ended Mode
Figure 7.5 shows two example window comparisons for Single-ended mode, with ADC2LT = 0x20 and
ADC2GT = 0x10. In Single-ended mode, the codes vary from 0 to VREF x (255/256) and are represented
as 8-bit unsigned integers. In the left example, an AD2WINT interrupt will be generated if the ADC2 con-
version word (ADC2) is within the range defined by ADC2GT and ADC2LT (if 0x10  ADC2  0x20). In the
right example, and AD2WINT interrupt will be generated if ADC2 is outside of the range defined by
ADC2GT and ADC2LT (if ADC2  0x10 or ADC2  0x20).
100
Bits7-0:
Bits7-0:
R/W
R/W
Bit7
Bit7
ADC2 Programmable Window Detector
High byte of ADC2 Greater-Than Data Word.
Low byte of ADC2 Greater-Than Data Word.
R/W
R/W
Bit6
Bit6
SFR Definition 7.6. ADC2GT: ADC2 Greater-Than Data
SFR Definition 7.7. ADC2LT: ADC2 Less-Than Data
R/W
R/W
Bit5
Bit5
R/W
R/W
Bit4
Bit4
Rev. 1.5
R/W
R/W
Bit3
Bit3
R/W
R/W
Bit2
Bit2
R/W
R/W
Bit1
Bit1
SFR Address:
SFR Address:
SFR Page:
SFR Page:
R/W
R/W
Bit0
Bit0
0xC4
2
0xC6
2
00000000
Reset Value
Reset Value
11111111