188
9152BINDCO02/10
ATA8743
28.7 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 ATtiny24/44/84.
Figure 28-3. High-voltage Serial Programming
The minimum period for the Serial Clock Input (SCI) during High-voltage Serial Programming is
220 ns.
Table 28-12. Pin Name Mapping
Signal Name in High-voltage
Serial Programming Mode
Pin Name
I/O
Function
SDI
PA6
I
Serial Data Input
SII
PA5
I
Serial Instruction Input
SDO
PA4
O
Serial Data Output
SCI
PB0
I
Serial Clock Input (min. 220ns period)
Table 28-13. Pin Values Used to Enter Programming Mode
Pin
Symbol
Value
PA0
Prog_enable[0]
0
PA1
Prog_enable[1]
0
PA2
Prog_enable[2]
0
VCC
GND
SDO
SII
SDI
(RESET)
+1.8 - 5.5V
PA6
PA5
PA4
PB3
+11.5 - 12.5V
PB0
SCI
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