ATMEGA16A-MUR Atmel, ATMEGA16A-MUR Datasheet - Page 60

• Manufacturer Part Number: ATMEGA16A-MUR
• Description: MCU AVR 16KB FLASH 16MHZ 44QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA16A-MUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

12.3.3
60
ATmega16A
Alternate Functions of Port C
The Port C pins with alternate functions are shown in
enabled, the pull-up resistors on pins PC5(TDI), PC3(TMS) and PC2(TCK) will be activated
even if a reset occurs.
Table 12-9.
The alternate pin configuration is as follows:
• TOSC2 – Port C, Bit 7
TOSC2, Timer Oscillator pin 2: When the AS2 bit in ASSR is set (one) to enable asynchronous
clocking of Timer/Counter2, pin PC7 is disconnected from the port, and becomes the inverting
output of the Oscillator amplifier. In this mode, a Crystal Oscillator is connected to this pin, and
the pin can not be used as an I/O pin.
• TOSC1 – Port C, Bit 6
TOSC1, Timer Oscillator pin 1: When the AS2 bit in ASSR is set (one) to enable asynchronous
clocking of Timer/Counter2, pin PC6 is disconnected from the port, and becomes the input of the
inverting Oscillator amplifier. In this mode, a Crystal Oscillator is connected to this pin, and the
pin can not be used as an I/O pin.
• TDI – Port C, Bit 5
TDI, JTAG Test Data In: Serial input data to be shifted in to the Instruction Register or Data Reg-
ister (scan chains). When the JTAG interface is enabled, this pin can not be used as an I/O pin.
• TDO – Port C, Bit 4
TDO, JTAG Test Data Out: Serial output data from Instruction Register or Data Register. When
the JTAG interface is enabled, this pin can not be used as an I/O pin.
The TD0 pin is tri-stated unless TAP states that shifts out data are entered.
• TMS – Port C, Bit 3
TMS, JTAG Test Mode Select: This pin is used for navigating through the TAP-controller state
machine. When the JTAG interface is enabled, this pin can not be used as an I/O pin.
• TCK – Port C, Bit 2
TCK, JTAG Test Clock: JTAG operation is synchronous to TCK. When the JTAG interface is
enabled, this pin can not be used as an I/O pin.
Port Pin
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
Port C Pins Alternate Functions
Alternate Function
TOSC2 (Timer Oscillator Pin 2)
TOSC1 (Timer Oscillator Pin 1)
TDI (JTAG Test Data In)
TDO (JTAG Test Data Out)
TMS (JTAG Test Mode Select)
TCK (JTAG Test Clock)
SDA (Two-wire Serial Bus Data Input/Output Line)
SCL (Two-wire Serial Bus Clock Line)
Table
12-9. If the JTAG interface is
8154B–AVR–07/09