ATA8742 ATMEL Corporation, ATA8742 Datasheet - Page 188
ATA8742
Manufacturer Part Number
ATA8742
Description
Manufacturer
ATMEL Corporation
Datasheet
1.ATA8742.pdf
(238 pages)
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188
High-voltage Serial Programming
ATA8742
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
Table 28-12. Pin Name Mapping
The minimum period for the Serial Clock Input (SCI) during High-voltage Serial Programming is
220 ns.
Table 28-13. Pin Values Used to Enter Programming Mode
Signal Name in High-voltage
Serial Programming Mode
SDI
SII
SDO
SCI
Pin
PA0
PA1
PA2
SCI
+11.5 - 12.5V
Symbol
Prog_enable[0]
Prog_enable[1]
Prog_enable[2]
PB3
PB0
GND
Pin Name
PA6
PA5
PA4
PB0
(RESET)
I/O
I
I
O
I
VCC
PA4
PA5
PA6
Function
Serial Data Input
Serial Instruction Input
Serial Data Output
Serial Clock Input (min. 220ns period)
+1.8 - 5.5V
SDO
SII
SDI
9151A–INDCO–07/09
Value
0
0
0
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