ATmega32U4 Atmel Corporation, ATmega32U4 Datasheet - Page 372
ATmega32U4
Manufacturer Part Number
ATmega32U4
Description
Manufacturer
Atmel Corporation
Specifications of ATmega32U4
Flash (kbytes)
32 Kbytes
Pin Count
44
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
14
Hardware Qtouch Acquisition
No
Max I/o Pins
26
Ext Interrupts
13
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
Twi (i2c)
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
12
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
3.3
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
4
Output Compare Channels
12
Input Capture Channels
2
Pwm Channels
8
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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Table 28-17. JTAG Programming Instruction (Continued)
Notes:
7766F–AVR–11/10
Instruction
8d. Read Fuse Low Byte
8e. Read Lock Bits
8f. Read Fuses and Lock Bits
9a. Enter Signature Byte Read
9b. Load Address Byte
9c. Read Signature Byte
10a. Enter Calibration Byte Read
10b. Load Address Byte
10c. Read Calibration Byte
11a. Load No Operation Command
1. This command sequence is not required if the seven MSB are correctly set by the previous command sequence (which is
2. Repeat until o = “1”.
3. Set bits to “0” to program the corresponding Fuse, “1” to unprogram the Fuse.
4. Set bits to “0” to program the corresponding Lock bit, “1” to leave the Lock bit unchanged.
5. “0” = programmed, “1” = unprogrammed.
6. The bit mapping for Fuses Extended byte is listed in
7. The bit mapping for Fuses High byte is listed in
8. The bit mapping for Fuses Low byte is listed in
9. The bit mapping for Lock bits byte is listed in
10. Address bits exceeding PCMSB and EEAMSB
11. All TDI and TDO sequences are represented by binary digits (0b...).
normally the case).
Set (Continued)
o = data out, i = data in, x = don’t care
(9)
(8)
a = address high bits, b = address low bits, c = address extended bits, H = 0 - Low byte, 1 - High Byte,
TDI Sequence
0110010_00000000
0110011_00000000
0110110_00000000
0110111_00000000
0111010_00000000
0111110_00000000
0110010_00000000
0110110_00000000
0110111_00000000
0000011_bbbbbbbb
0110010_00000000
0110011_00000000
0000011_bbbbbbbb
0110110_00000000
0110111_00000000
0100011_00000000
0110011_00000000
0100011_00001000
0100011_00001000
Table 28-1 on page 346
Table 28-5 on page 348
(Table 28-11
Table 28-4 on page 348
Table 28-3 on page 347
and
Table
28-12) are don’t care
TDO Sequence
xxxxxxx_xxxxxxxx
xxxxxxx_oooooooo
xxxxxxx_xxxxxxxx
xxxxxxx_xxoooooo
xxxxxxx_xxxxxxxx
xxxxxxx_oooooooo
xxxxxxx_oooooooo
xxxxxxx_oooooooo
xxxxxxx_oooooooo
xxxxxxx_xxxxxxxx
xxxxxxx_xxxxxxxx
xxxxxxx_oooooooo
xxxxxxx_xxxxxxxx
xxxxxxx_xxxxxxxx
xxxxxxx_oooooooo
xxxxxxx_xxxxxxxx
xxxxxxx_xxxxxxxx
xxxxxxx_xxxxxxxx
xxxxxxx_xxxxxxxx
ATmega16/32U4
Notes
(5)
(5)
Fuse Ext. byte
Fuse High byte
Fuse Low byte
Lock bits
372
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