AT90PWM161 Atmel Corporation, AT90PWM161 Datasheet - Page 236

• Manufacturer Part Number: AT90PWM161
• Manufacturer: Atmel Corporation

Specifications of AT90PWM161

• Flash (kbytes): 16 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 20
• Ext Interrupts: 3
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 10
• Adc Speed (ksps): 125
• Analog Comparators: 3
• Resistive Touch Screen: No
• Dac Channels: 1
• Dac Resolution (bits): 10
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.25
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 125
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 1
• Output Compare Channels: 8
• Input Capture Channels: 1
• Pwm Channels: 6
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

20.4
236
Boot Loader Lock Bits
AT90PWM81
Figure 20-2.
Note:
If no Boot Loader capability is needed, the entire Flash is available for application code. The Boot Loader
has two separate sets of Boot Lock bits which can be set independently. This gives the user a unique flex-
ibility to select different levels of protection.
The user can select:
See
or Parallel Programming mode, but they can be cleared by a Chip Erase command only. The general Write
Lock (Lock Bit mode 2) does not control the programming of the Flash memory by SPM instruction. Sim-
• To protect the entire Flash from a software update by the MCU.
• To protect only the Boot Loader Flash section from a software update by the MCU.
• To protect only the Application Flash section from a software update by the MCU.
• Allow software update in the entire Flash.
Table 20-2
1. The parameters in the figure above are given in
Boot Loader Flash Section
Boot Loader Flash Section
Application Flash Section
Application Flash Section
Application Flash Section
Application Flash Section
and
Memory Sections
Program Memory
Program Memory
BOOTSZ = '11'
BOOTSZ = '01'
Table 20-3
for further details. The Boot Lock bits can be set in software and in Serial
0x0000
End RWW
Start NRWW
End Application
Start Boot Loader
Flashend
0x0000
End RWW
Start NRWW
End Application
Start Boot Loader
Flashend
Table 20-7 on page
Boot Loader Flash Section
Boot Loader Flash Section
Application Flash Section
Application Flash Section
Application Flash Section
Program Memory
Program Memory
BOOTSZ = '10'
BOOTSZ = '00'
246.
0x0000
End RWW
Start NRWW
End Application
Start Boot Loader
Flashend
0x0000
End RWW, End Application
Start NRWW, Start Boot Loader
Flashend
7734P–AVR–08/10