ATA8742-PXQW Atmel, ATA8742-PXQW Datasheet - Page 189

• Manufacturer Part Number: ATA8742-PXQW
• Description: MCU W/TRANSMITTER ASK/FSK 24QFN
• Manufacturer: Atmel

Specifications of ATA8742-PXQW

• Frequency: 433MHz
• Applications: Home Automation, Remote Sensing, RKE
• Modulation Or Protocol: ASK, FSK
• Data Rate - Maximum: 32 kBit/s
• Power - Output: 7.5dBm
• Current - Transmitting: 9.8mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Memory Size: 4kB Flash, 256B EEPROM, 256B SRAM
• Voltage - Supply: 2 V ~ 4 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 24-VQFN Exposed Pad, 24-HVQFN, 24-SQFN, 24-DHVQFN
• Processor Series: ATA8x
• Core: AVR8
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 4 KB
• Data Ram Size: 256 B
• Interface Type: SPI, USI
• Maximum Clock Frequency: 8.1 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: ATASTK512-EK1-IND
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / Rohs Status: Details

28.8
28.8.1
28.8.2
28.8.3
9151A–INDCO–07/09
High-voltage Serial Programming Algorithm
Enter High-voltage Serial Programming Mode
Considerations for Efficient Programming
Chip Erase
To program and verify the ATtiny24/44/84 in the High-voltage Serial Programming mode, the fol-
lowing sequence is recommended (See instruction formats in
The following algorithm puts the device in High-voltage Serial Programming mode:
1. Apply 4.5 - 5.5V between V
2. Set RESET pin to “0” and toggle SCI at least six times.
3. Set the Prog_enable pins listed in
4. Apply V
5. Shortly after latching the Prog_enable signature, the device will actively output data on
6. Wait at least 50 µs before giving any serial instructions on SDI/SII.
Table 28-14. 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
The Chip Erase will erase the Flash and EEPROM
not reset until the Program memory has been completely erased. The Fuse bits are not
changed. A Chip Erase must be performed before the Flash and/or EEPROM are
re-programmed.
Note:
1. Load command “Chip Erase” (see
2. Wait after Instr. 3 until SDO goes high for the “Chip Erase” cycle to finish.
3. Load Command “No Operation”.
Supply Voltage
V
4.5V
5.5V
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.
CC
ns.
after the High-voltage has been applied to ensure the Prog_enable signature has been
latched.
the Prog_enable[2]/SDO pin, and the resulting drive contention may increase the power
consumption. To minimize this drive contention, release the Prog_enable[2] pin after
t
HVRST
1. The EEPROM memory is preserved during Chip Erase if the EESAVE Fuse is programmed.
has elapsed.
HVRST
- 5.5V to RESET. Keep the Prog_enable pins unchanged for at least t
RESET Pin High-voltage Threshold
CC
and GND.
V
11.5V
11.5V
HVRST
Table 28-13 on page 188
Table 28-15 on page
(1)
memories plus Lock bits. The Lock bits are
192).
Minimum High-voltage Period for
Table 28-15 on page
to “000” and wait at least 100
Latching Prog_enable
100 ns
100 ns
t
HVRST
ATA8742
192):
HVRST
189