ATmega88PA Atmel Corporation, ATmega88PA Datasheet - Page 46
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ATmega88PA
Manufacturer Part Number
ATmega88PA
Description
Manufacturer
Atmel Corporation
Specifications of ATmega88PA
Flash (kbytes)
8 Kbytes
Pin Count
32
Max. Operating Frequency
20 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
Yes
Crypto Engine
No
Sram (kbytes)
1
Eeprom (bytes)
512
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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10.11.2
10.11.3
8271D–AVR–05/11
MCUCR – MCU Control Register
PRR – Power Reduction Register
• Bit 6 – BODS: BOD Sleep
The BODS bit must be written to logic one in order to turn off BOD during sleep, see
on page
BODSE in MCUCR. To disable BOD in relevant sleep modes, both BODS and BODSE must first
be set to one. Then, to set the BODS bit, BODS must be set to one and BODSE must be set to
zero within four clock cycles.
The BODS bit is active three clock cycles after it is set. A sleep instruction must be executed
while BODS is active in order to turn off the BOD for the actual sleep mode. The BODS bit is
automatically cleared after three clock cycles.
• Bit 5 – BODSE: BOD Sleep Enable
BODSE enables setting of BODS control bit, as explained in BODS bit description. BOD disable
is controlled by a timed sequence.
Note:
• Bit 7 – PRTWI: Power Reduction TWI
Writing a logic one to this bit shuts down the TWI by stopping the clock to the module. When
waking up the TWI again, the TWI should be re initialized to ensure proper operation.
• Bit 6 – PRTIM2: Power Reduction Timer/Counter2
Writing a logic one to this bit shuts down the Timer/Counter2 module in synchronous mode (AS2
is 0). When the Timer/Counter2 is enabled, operation will continue like before the shutdown.
• Bit 5 – PRTIM0: Power Reduction Timer/Counter0
Writing a logic one to this bit shuts down the Timer/Counter0 module. When the Timer/Counter0
is enabled, operation will continue like before the shutdown.
• Bit 4 – Reserved
This bit is reserved in ATmega48A/PA/88A/PA/168A/PA/328/P and will always read as zero.
• Bit 3 – PRTIM1: Power Reduction Timer/Counter1
Writing a logic one to this bit shuts down the Timer/Counter1 module. When the Timer/Counter1
is enabled, operation will continue like before the shutdown.
Bit
0x35 (0x55)
Read/Write
Initial Value
Bit
(0x64)
Read/Write
Initial Value
1. BODS and BODSE only available for picoPower devices ATmega48PA/88PA/168PA/328P
40. Writing to the BODS bit is controlled by a timed sequence and an enable bit,
PRTWI
R/W
7
0
R
7
–
0
ATmega48A/PA/88A/PA/168A/PA/328/P
PRTIM2
BODS
R/W
R/W
6
0
6
0
(1)
(1)
PRTIM0
BODSE
R/W
5
0
R/W
5
0
(1)
(1)
R
4
–
0
PUD
R/W
0
4
PRTIM1
R/W
3
0
R
3
–
0
PRSPI
R/W
2
0
R
2
–
0
PRUSART0
IVSEL
R/W
R/W
1
0
1
0
IVCE
R/W
PRADC
0
0
R/W
0
0
Table 10-1
MCUCR
PRR
46
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