C8051F045R Silicon Labs, C8051F045R Datasheet - Page 98

• 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
98
Bit7:
Bit6:
Bit5:
Bit4:
Bits3-1:
Bit0:
An important note about external convert start (CNVSTR0 and CNVSTR2): If CNVSTR2 is enabled in
AD2EN
R/W
Bit7
AD2EN: ADC2 Enable Bit.
0: ADC2 Disabled. ADC2 is in low-power shutdown.
1: ADC2 Enabled. ADC2 is active and ready for data conversions.
AD2TM: ADC2 Track Mode Bit.
0: Normal Track Mode: When ADC2 is enabled, tracking is continuous unless a conversion is in
process.
1: Low-power Track Mode: Tracking defined by AD2CM2-0 bits (see below).
AD2INT: ADC2 Conversion Complete Interrupt Flag.
This flag must be cleared by software.
0: ADC2 has not completed a data conversion since the last time this flag was cleared.
1: ADC2 has completed a data conversion.
AD2BUSY: ADC2 Busy Bit.
Read:
0: ADC2 Conversion is complete or a conversion is not currently in progress. AD2INT is set to
logic 1 on the falling edge of AD2BUSY.
1: ADC2 Conversion is in progress.
Write:
0: No Effect.
1: Initiates ADC2 Conversion if AD2CM2-0 = 000b
AD2CM2-0: ADC2 Start of Conversion Mode Select.
AD2TM = 0:
000: ADC2 conversion initiated on every write of ‘1’ to AD2BUSY.
001: ADC2 conversion initiated on overflow of Timer 3.
010: ADC2 conversion initiated on rising edge of external CNVSTR2 or CNVSTR0.
011: ADC2 conversion initiated on overflow of Timer 2.
1xx: ADC2 conversion initiated on write of ‘1’ to AD0BUSY (synchronized with ADC0 software-
commanded conversions).
AD2TM = 1:
000: Tracking initiated on write of ‘1’ to AD2BUSY and lasts 3 SAR2 clocks, followed by conver-
sion.
001: Tracking initiated on overflow of Timer 3 and lasts 3 SAR2 clocks, followed by conversion.
010: ADC2 tracks only when CNVSTR2 (or CNVSTR0, See Section 7.2.1) input is logic low; con-
version starts on rising CNVSTR2 edge.
011: Tracking initiated on overflow of Timer 2 and lasts 3 SAR2 clocks, followed by conversion.
1xx: Tracking initiated on write of ‘1’ to AD0BUSY and lasts 3 SAR2 clocks, followed by conver-
sion.
AD2WINT: ADC2 Window Compare Interrupt Flag.
0: ADC2 window comparison data match has not occurred since this flag was last cleared.
1: ADC2 window comparison data match has occurred. This flag must be cleared in software.
the digital crossbar (
on page 204
CNVSTR0 is enabled in the digital crossbar and CNVSTR2 is not enabled, then CNVSTR0 may
serve as the start of conversion for both ADC0 and ADC2.
AD2TM
R/W
Bit6
SFR Definition 7.4. ADC2CN: ADC2 Control
AD2INT AD2BUSY AD2CM2 AD2CM1
), CNVSTR2 will be the external convert start signal for ADC2. However, if only
R/W
Bit5
Section “17.1. Ports 0 through 3 and the Priority Crossbar Decoder”
R/W
Bit4
Rev. 1.5
R/W
Bit3
R/W
Bit2
AD2CM0
R/W
Bit1
SFR Address:
AD2WINT 00000000
SFR Page:
R/W
Bit0
0xE8
2
Reset Value