ATmega88 Automotive Atmel Corporation, ATmega88 Automotive Datasheet - Page 132

• Manufacturer Part Number: ATmega88 Automotive
• Manufacturer: Atmel Corporation

Specifications of ATmega88 Automotive

• Flash (kbytes): 8 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: 23
• Ext Interrupts: 24
• Usb Speed: No
• Usb Interface: No
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• 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): 1
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 150
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 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

14.10.5
14.10.6
14.10.7
14.10.8
132
ATmega48/88/168 Automotive
Output Compare Register 1 A – OCR1AH and OCR1AL
Output Compare Register 1 B – OCR1BH and OCR1BL
Input Capture Register 1 – ICR1H and ICR1L
Timer/Counter1 Interrupt Mask Register – TIMSK1
The Output Compare Registers contain a 16-bit value that is continuously compared with the
counter value (TCNT1). A match can be used to generate an Output Compare interrupt, or to
generate a waveform output on the OC1x pin.
The Output Compare Registers are 16-bit in size. To ensure that both the high and low bytes are
written simultaneously when the CPU writes to 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.
The Input Capture is updated with the counter (TCNT1) value each time an event occurs on the
ICP1 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 Bits
These bits are unused bits in the ATmega48/88/168, 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 52) is executed when the ICF1 Flag, located in TIFR1, is set.
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
See “Accessing 16-bit Registers” on page 107.
See “Accessing 16-bit Registers” on page 107.
R/W
R/W
R/W
R
7
0
7
0
7
0
7
–
0
R/W
R/W
R/W
R
6
–
0
6
0
6
0
6
0
ICIE1
R/W
R/W
R/W
R/W
5
0
5
0
5
0
5
0
R/W
R/W
R/W
R
4
–
0
4
0
4
0
4
0
OCR1A[15:8]
OCR1B[15:8]
OCR1A[7:0]
OCR1B[7:0]
ICR1[15:8]
ICR1[7:0]
R/W
R/W
R/W
R
3
–
0
3
0
3
0
3
0
OCIE1B
R/W
R/W
R/W
R/W
2
0
2
0
2
0
2
0
OCIE1A
R/W
R/W
R/W
R/W
1
0
1
0
1
0
1
0
TOIE1
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
7530I–AVR–02/10
OCR1AH
OCR1BH
OCR1AL
OCR1BL
TIMSK1
ICR1H
ICR1L