ata5773 ATMEL Corporation, ata5773 Datasheet - Page 220

• Manufacturer Part Number: ata5773
• Description: Microcontroller With Uhf Ask/fsk Transmitter
• Manufacturer: ATMEL Corporation

19.7
19.7.1
168
High-Voltage Serial Programming Algorithm
ATtiny24/44/84
Enter High-voltage Serial Programming Mode
Table 19-13. Pin Name Mapping
The minimum period for the Serial Clock Input (SCI) during High-voltage Serial Programming is
220 ns.
Table 19-14. Pin Values Used to Enter Programming Mode
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:
If the rise time of the V
tive algorithm can be used:
Signal Name in High-voltage
Serial Programming Mode
SDI
SII
SDO
SCI
Pin
PA0
PA1
PA2
1. Set Prog_enable pins listed in
2. Apply 4.5 - 5.5V between V
3. Wait 20 - 60 µs, and apply 11.5 - 12.5V to RESET.
4. Keep the Prog_enable pins unchanged for at least 10 µs after the High-voltage has
5. Release the Prog_enable[2] pin after t
6. Wait at least 300 µs before giving any serial instructions on SDI/SII.
7. Exit Programming mode by power the device down or by bringing RESET pin to 0V.
1. Set Prog_enable pins listed in
2. Apply 4.5 - 5.5V between V
3. Monitor V
to 0V.
the next 20 µs.
been applied to ensure the Prog_enable Signature has been latched.
to 0V.
CC
, and as soon as V
CC
Symbol
Prog_enable[0]
Prog_enable[1]
Prog_enable[2]
is unable to fulfill the requirements listed above, the following alterna-
CC
CC
and GND. Ensure that V
and GND.
Table 19-14 on page 168
Table 19-14 on page 168
CC
Pin Name
PA6
PA5
PA4
PB0
reaches 0.9 - 1.1V, apply 11.5 - 12.5V to RESET.
HVRST
has elapsed.
I/O
I
I
O
I
Function
Serial Data Input
Serial Instruction Input
Serial Data Output
Serial Clock Input (min. 220ns period)
CC
Table 19-16 on page
to “000”, RESET pin and V
to “000”, RESET pin and V
reaches at least 1.8V within
Value
8006G–AVR–01/08
0
0
0
172):
CC
CC