C8051F067-GQ Silicon Laboratories Inc, C8051F067-GQ Datasheet - Page 90

• Manufacturer Part Number: C8051F067-GQ
• Description: IC 8051 MCU 32K FLASH 64TQFP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F06xr

Specifications of C8051F067-GQ

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 32KB (32K 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 2x16b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP, 64-VQFP
• Processor Series: C8051F0x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 4.25 KB
• Interface Type: I2C, SMBus, SPI, UART
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 24
• Number Of Timers: 5
• Operating Supply Voltage: 2.7 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: C8051F060DK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 16 bit, 1 Channel
• On-chip Dac: 12 bit, 2 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: 336-1222

C8051F060/1/2/3/4/5/6/7
7.2.2. Tracking Modes
The AD2TM bit in register ADC2CN controls the ADC2 track-and-hold mode. In its default state, the ADC2
input is continuously tracked, except when a conversion is in progress. When the AD2TM bit is logic 1,
ADC2 operates in low-power track-and-hold mode. In this mode, each conversion is preceded by a track-
ing period of 3 SAR clocks (after the start-of-conversion signal). When the CNVSTR2 signal is used to ini-
tiate conversions in low-power tracking mode, ADC2 tracks only when CNVSTR2 is low; conversion
begins on the rising edge of CNVSTR2 (see Figure 7.3). Tracking can also be disabled (shutdown) when
the device is in low power standby or sleep modes. Low-power track-and-hold mode is also useful when
AMUX settings are frequently changed, due to the settling time requirements described in
“7.2.3. Settling Time Requirements” on page
90
Timer 3, Timer 2 Overflow
(AD2CM[1:0]=00, 01, 11)
Write '1' to AD2BUSY,
(AD2CM[1:0]=10)
Figure 7.3. 10-Bit ADC Track and Conversion Example Timing
SAR Clocks
SAR Clocks
SAR Clocks
AD2TM=1
AD2TM=0
CNVSTR2
AD2TM=1
AD2TM=0
Low Power
or Convert
Low Power
or Convert
Track or
Convert
A. ADC2 Timing for External Trigger Source
Track or Convert
B. ADC2 Timing for Internal Trigger Source
91.
1
1
Rev. 1.2
Track
2
2
Track
3
3
4
4
1
Convert
5
5
2
6
6
3
7
7
4
Convert
8
8
5
Convert
Convert
9
9
6
10 11 12
10 11
7
8
9
13 14
10 11
Low Power Mode
Track
Low Power
Mode
Track
Section