ATmega32M1 Atmel Corporation, ATmega32M1 Datasheet - Page 128
ATmega32M1
Manufacturer Part Number
ATmega32M1
Description
Manufacturer
Atmel Corporation
Specifications of ATmega32M1
Flash (kbytes)
32 Kbytes
Pin Count
32
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
12
Hardware Qtouch Acquisition
No
Max I/o Pins
27
Ext Interrupts
27
Usb Speed
No
Usb Interface
No
Spi
1
Uart
1
Can
1
Lin
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
11
Adc Resolution (bits)
10
Adc Speed (ksps)
125
Analog Comparators
4
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
2
Eeprom (bytes)
1024
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
2
Output Compare Channels
14
Input Capture Channels
1
Pwm Channels
10
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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15.11.7
15.11.8
128
ATmega16M1/32M1/64M1
ICR1H and ICR1L – Input Capture Register 1
TIMSK1 – Timer/Counter1 Interrupt Mask Register
The Input Capture is updated with the counter (TCNTn) value each time an event occurs on the
ICPn pin (or optionally on the Analog Comparator output for Timer/Counter1). 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.
• Bit 7, 6 – Res: Reserved
These bits are reserved 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
ICF1 Flag, located in TIFR1, is set.
• Bit 4, 3 – Res: Reserved
These bits are reserved 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
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
when the OCF1A Flag, located in TIFR1, is set.
• Bit 0 – TOIE1: Timer/Counter1, Overflow 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 Overflow interrupt is enabled. The corresponding Interrupt Vector
(see
Flag, located in TIFR1, is set.
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
“Interrupt Vectors in ATmega16M1/32M1/64M1” on page
See “Accessing 16-bit Registers” on page 104.
“Interrupt Vectors in ATmega16M1/32M1/64M1” on page
R/W
R
7
0
7
–
0
“Interrupt Vectors in ATmega16M1/32M1/64M1” on page
“Interrupt Vectors in ATmega16M1/32M1/64M1” on page
R/W
R
6
0
6
–
0
ICIE1
R/W
R/W
5
0
5
0
R/W
R
4
–
0
4
0
ICR1[15:8]
ICR1[7:0]
R/W
R
3
–
0
3
0
OCIE1B
R/W
R/W
2
0
2
0
53) is executed when the TOV1
OCIE1A
R/W
R/W
53) is executed when the
1
0
1
0
TOIE1
R/W
R/W
53) is executed
53) is executed
0
0
0
0
8209D–AVR–11/10
TIMSK1
ICR1H
ICR1L
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