ATmega324PA Atmel Corporation, ATmega324PA Datasheet - Page 138
ATmega324PA
Manufacturer Part Number
ATmega324PA
Description
Manufacturer
Atmel Corporation
Specifications of ATmega324PA
Flash (kbytes)
32 Kbytes
Pin Count
44
Max. Operating Frequency
20 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
32
Ext Interrupts
32
Usb Speed
No
Usb Interface
No
Spi
3
Twi (i2c)
1
Uart
2
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
2
Eeprom (bytes)
1024
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
Yes
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8 to 5.5
Operating Voltage (vcc)
1.8 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
3
Output Compare Channels
6
Input Capture Channels
1
Pwm Channels
6
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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16.11.11 ICR3H and ICR3L – Input Capture Register 3
16.11.12 TIMSK1 – Timer/Counter1 Interrupt Mask Register
8272C–AVR–06/11
temporary High Byte Register (TEMP). This temporary register is shared by all the other 16-bit
registers. See “Accessing 16-bit Registers” on page 113.
The Input Capture is updated with the counter (TCNT3) value each time an event occurs on the
ICPn pin (or optionally on the Analog Comparator output for Timer/Counter3). The Input Capture
can be used for defining the counter TOP value.
The Input Capture Register is 16-bit in size. To ensure that both the high and low bytes are read
simultaneously when the CPU accesses these registers, the access is performed using an 8-bit
temporary High Byte Register (TEMP). This temporary register is shared by all the other 16-bit
registers. See “Accessing 16-bit Registers” on page 113.
• Bit 7:6 – Reserved
These bits are unused and will always read as zero.
• Bit 5 – ICIE1: Timer/Counter1, Input Capture Interrupt Enable
When this bit is written to one, and the I-flag in the Status Register is set (interrupts globally
enabled), the Timer/Counter1 Input Capture interrupt is enabled. The corresponding Interrupt
Vector (see “Interrupts” on page 61) is executed when the ICF1 Flag, located in TIFR1, is set.
• Bit 4:3 – Reserved
These bits are unused and will always read as zero.
• Bit 2 – OCIE1B: Timer/Counter1, Output Compare B Match Interrupt Enable
When this bit is written to one, and the I-flag in the Status Register is set (interrupts globally
enabled), the Timer/Counter1 Output Compare B Match interrupt is enabled. The corresponding
Interrupt Vector (see “Interrupts” on page 61) is executed when the OCF1B Flag, located in
TIFR1, is set.
• Bit 1 – OCIE1A: Timer/Counter1, Output Compare A Match Interrupt Enable
When this bit is written to one, and the I-flag in the Status Register is set (interrupts globally
enabled), the Timer/Counter1 Output Compare A Match interrupt is enabled. The corresponding
Interrupt Vector (see “Interrupts” on page 61) is executed when the OCF1A Flag, located in
TIFR1, is set.
Bit
(0x97)
(0x96)
Read/Write
Initial Value
Bit
(0x6F)
Read/Write
Initial Value
ATmega164A/PA/324A/PA/644A/PA/1284/P
R/W
R
7
0
7
–
0
R/W
R
6
–
0
6
0
ICIE1
R/W
R/W
5
0
5
0
R/W
R
4
–
0
4
0
ICR3[15:8]
ICR3[7:0]
R/W
R
3
–
0
3
0
OCIE1B
R/W
R/W
2
0
2
0
OCIE1A
R/W
R/W
1
0
1
0
TOIE1
R/W
R/W
0
0
0
0
TIMSK1
ICR3H
ICR3L
138
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