ATMEGA16HVA-4CKU Atmel, ATMEGA16HVA-4CKU Datasheet - Page 157

• Manufacturer Part Number: ATMEGA16HVA-4CKU
• Description: MCU AVR 16K FLASH 4MHZ 36-LGA
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA16HVA-4CKU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 7
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 9 V
• Data Converters: A/D 5x12b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 36-LGA
• Processor Series: ATMEGA16x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: SPI
• Maximum Clock Frequency: 4 MHz
• Number Of Programmable I/os: 6
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, ATAVRSB200, ATAVRSB201
• Minimum Operating Temperature: - 20 C
• On-chip Adc: 12 bit, 5 Channel
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32ATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

27.8
27.8.1
27.8.2
8024A–AVR–04/08
High-voltage Serial Programming Algorithm
Enter High-voltage Serial Programming Mode
Considerations for Efficient Programming
To program and verify the ATmega8HVA/16HVA in the High-voltage Serial Programming mode,
the following sequence is recommended (See instruction formats in
The following algorithm puts the device in Serial (High-voltage) Programming mode:
1. Set Prog_enable pins listed in
2. Apply 3.0 - 3.5V between V
3. Wait 20 - 60 µs, and apply V
4. Keep the Prog_enable pins unchanged for at least t
5. Release Prog_enable[1] pin to avoid drive contention on the Prog_enable[1]/SDO pin.
6. Wait at least 300 µs before giving any serial instructions on SDI/SII.
If the rise time of the V
tive algorithm can be used.
1. Set Prog_enable pins listed in
2. Apply 3.0 - 3.5V between V
3. Monitor V
4. Keep the Prog_enable pins unchanged for at least t
5. Release Prog_enable[1] pin to avoid drive contention on the Prog_enable[1]/SDO pin.
6. Wait until V
Table 27-13. High-voltage Reset Characteristics
The loaded command and address are retained in the device during programming. For efficient
programming, the following should be considered.
• The command needs only be loaded once when writing or reading multiple memory locations.
• Skip writing the data value 0xFF that is the contents of the entire EEPROM (unless the
• Address High byte needs only be loaded before programming or reading a new 256 word
EESAVE Fuse is programmed) and Flash after a Chip Erase.
window in Flash or 256 byte EEPROM. This consideration also applies to Signature bytes
reading.
Supply Voltage
V
next 20 µs.
applied to ensure the Prog_enable Signature has been latched.
V
applied to ensure the Prog_enable Signature has been latched.
CC
CC
3.0V
3.5V
V
to 0V.
to 0V.
CC
CC
CC
, and as soon as V
actually reaches 3.0 - 3.5V before giving any serial instructions on SDI/SII.
RESET Pin High-voltage Threshold
CC
is unable to fulfill the requirements listed above, the following alterna-
CC
CC
HRST
and GND. Ensure that V
Table 27-12 on page 156
Table 27-12 on page 156
and GND.
CC
V
11.5V
11.5V
HVRST
- 12.5V to RESET.
reaches 0.9 - 1.1V, apply V
ATmega8HVA/16HVA
HVRST
HVRST
CC
to “0000”, RESET pin to 0V and
to “0000”, RESET pin to 0V and
after the High-voltage has been
after the High-voltage has been
reaches at least 1.8V within the
Minimum High-voltage Period for
HRST
Latching Prog_enable
Table
- 12.5V to RESET.
27-14):
t
10 µs
10 µs
HVRST
157