Datasheet

156
8024A–AVR–04/08
ATmega8HVA/16HVA
27.7 High-voltage Serial Programming
This section describes how to program and verify Flash Program memory, EEPROM Data mem-
ory, Lock bits and Fuse bits in the ATmega8HVA/16HVA.
Figure 27-3. High-voltage Serial Programming
Table 27-11. Pin Name Mapping
Signal Name in High-voltage
Serial Programming Mode Pin Name I/O Function
SDO PB1 O Serial Data Output
SDI PB2 I Serial Data Input
SII PB3 I Serial Instruction Input
SCI PC0 I Serial Clock Input (min. 2/f
ck
period)
Table 27-12. Pin Values Used to Enter Programming Mode
Pin Name Symbol Value
PB0 Prog_enable[0] 0
PB1 Prog_enable[1] 0
PB2 Prog_enable[2] 0
PB3 Prog_enable[3] 0
VCC
GND
SDO
SII
SCI
RESET
+3.0 - 3.5V
PC0
PB3
PB1
+11.5 - 12.5V
PB2
SDI
Prog_enable[0] PB0