C8051F061-GQ Silicon Laboratories Inc, C8051F061-GQ Datasheet - Page 207
![IC 8051 MCU 64K FLASH 64TQFP](/photos/12/20/122063/c8051f061-gq_sml.jpg)
C8051F061-GQ
Manufacturer Part Number
C8051F061-GQ
Description
IC 8051 MCU 64K FLASH 64TQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F06xr
Specifications of C8051F061-GQ
Program Memory Type
FLASH
Program Memory Size
64KB (64K x 8)
Package / Case
64-TQFP, 64-VQFP
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
CAN, SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
24
Ram Size
4.25K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 2x16b, 8x10b; D/A 2x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
C8051F0x
Core
8051
Data Bus Width
8 bit
Data Ram Size
4.25 KB
Interface Type
CAN/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
2-ch x 16-bit
On-chip Dac
2-ch x 12-bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1215
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The PnMDOUT registers control the output modes of the port pins regardless of whether the Crossbar has
allocated the Port pin for a digital peripheral or not. The exceptions to this rule are: the Port pins connected
to SDA, SCL, RX0 (if UART0 is in Mode 0), and RX1 (if UART1 is in Mode 0) are always configured as
Open-Drain outputs, regardless of the settings of the associated bits in the PnMDOUT registers.
18.1.3. Configuring Port Pins as Digital Inputs
A Port pin is configured as a digital input by setting its output mode to “Open-Drain” and writing a logic 1 to
the associated bit in the Port Data register. For example, P3.7 is configured as a digital input by setting
P3MDOUT.7 to a logic 0 and P3.7 to a logic 1.
If the Port pin has been assigned to a digital peripheral by the Crossbar and that pin functions as an input
(for example RX0, the UART0 receive pin), then the output drivers on that pin are automatically disabled.
18.1.4. Weak Pull-ups
By default, each Port pin has an internal weak pull-up device enabled which provides a resistive connec-
tion (about 100 k) between the pin and VDD. The weak pull-up devices can be globally disabled by writ-
ing a logic 1 to the Weak Pull-up Disable bit, (WEAKPUD, XBR2.7). The weak pull-up is automatically
deactivated on any pin that is driving a logic 0; that is, an output pin will not contend with its own pull-up
device. The weak pull-up device can also be explicitly disabled on a Port 1 pin by configuring the pin as an
Analog Input, as described below.
18.1.5. Configuring Port 1 and 2 pins as Analog Inputs
The pins on Port 1 can serve as analog inputs to the ADC2 analog MUX (C8051F060/1/2/3 only) and the
pins on Port 2 can serve as analog inputs to the Comparators (all devices). A Port pin is configured as an
Analog Input by writing a logic 0 to the associated bit in the PnMDIN registers. All Port pins default to a
Digital Input mode. Configuring a Port pin as an analog input:
Note that the output drivers on a pin configured as an Analog Input are not explicitly disabled. Therefore,
the associated PnMDOUT bits of pins configured as Analog Inputs should explicitly be set to logic 0
(Open-Drain output mode), and the associated Port Data bits should be set to logic 1 (high-impedance).
Also note that it is not required to configure a Port pin as an Analog Input in order to use it as an input to
ADC2 or the Comparators, however, it is strongly recommended. See the analog peripheral’s correspond-
ing section in this datasheet for further information.
1. Disables the digital input path from the pin. This prevents additional power supply current from
2. Disables the weak pull-up device on the pin.
3. Causes the Crossbar to “skip over” the pin when allocating Port pins for digital peripherals.
being drawn when the voltage at the pin is near VDD / 2. A read of the Port Data bit will return
a logic 0 regardless of the voltage at the Port pin.
Rev. 1.2
C8051F060/1/2/3/4/5/6/7
207
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