ATmega16U4 Atmel Corporation, ATmega16U4 Datasheet - Page 77
ATmega16U4
Manufacturer Part Number
ATmega16U4
Description
Manufacturer
Atmel Corporation
Specifications of ATmega16U4
Flash (kbytes)
16 Kbytes
Pin Count
44
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
14
Hardware Qtouch Acquisition
No
Max I/o Pins
26
Ext Interrupts
13
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
Twi (i2c)
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
12
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
2.1
Eeprom (bytes)
512
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
4
Output Compare Channels
12
Input Capture Channels
2
Pwm Channels
8
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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10.3.4
7766F–AVR–11/10
Alternate Functions of Port D
The Port D pins with alternate functions are shown in
Table 10-8.
The alternate pin configuration is as follows:
• T0/OC.4D/ADC10 – Port D, Bit 7
T0, Timer/Counter0 counter source.
OC.4D: Timer 4 Output Compare D. This pin can be used to generate a high-speed PWM signal
from Timer 4 module. The pin has to be configured as an output (DDD7 set “one”) to serve this
function.
ADC10: Analog to Digital Converter, Channel 10.
• T1/OC.4D/ADC9 – Port D, Bit 6
T1, Timer/Counter1 counter source.
OC.4D: Timer 4 Output Compare D. This pin can be used to generate a high-speed PWM signal
from Timer 4 module, complementary to OC.4D (PD7) signal. The pin has to be configured as
an output (DDD6 set “one”) to serve this function.
ADC9: Analog to Digital Converter, Channel 9
• XCK1/CTS – Port D, Bit 5
XCK1, USART1 External clock. The Data Direction Register (DDD5) controls whether the clock
is output (DDD5 set) or input (DDD5 cleared). The XCK1 pin is active only when the USART1
operates in Synchronous mode.
CTS: Clear-To-Send flow control signal used by enhanced UART module.
• ICP1/ADC8 – Port D, Bit 4
ICP1 – Input Capture Pin 1: The PD4 pin can act as an input capture pin for Timer/Counter1.
ADC8: Analog to Digital Converter, Channel 8
Port Pin
PD7
PD6
PD5
PD4
PD3
PD2
PD1
PD0
Alternate Function
T0/OC.4D/ADC10 (Timer/Counter0 Clock Input or Timer 4 Output Compare D /
PWM output or Analog to Digital Converter channel 10)
T1/OC.4D/ADC9 (Timer/Counter1 Clock Input or Timer 4 Output
Complementary Compare D / PWM output or Analog to Digital Converter
channel 9)
XCK1/CTS (USART1 External Clock Input/Output or UART flow control CTS
signal)
ICP1/ADC8 (Timer/Counter1 Input Capture Trigger or Analog to Digital
Converter channel 8)
INT3/TXD1 (External Interrupt3 Input or USART1 Transmit Pin)
INT2/RXD1 (External Interrupt2 Input or USART1 Receive Pin)
INT1/SDA (External Interrupt1 Input or TWI Serial DAta)
INT0/SCL/OC0B (External Interrupt0 Input or TWI Serial CLock or Output
Compare for Timer/Counter0)
Port D Pins Alternate Functions
.
.
Table
10-8.
ATmega16/32U4
77
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