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ATtiny261-ESSZ Scheda tecnica(PDF) 175 Page - ATMEL Corporation

Il numero della parte ATtiny261-ESSZ
Spiegazioni elettronici  8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
PDF  227 Pages
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Produttore elettronici  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATtiny261-ESSZ Scheda tecnica(HTML) 175 Page - ATMEL Corporation

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175
7753C–AVR–07/09
ATtiny261/ATtiny461/ATtiny861
Figure 22-1. Parallel Programming
Table 22-9.
Pin Name Mapping
Signal Name in
Programming Mode
Pin Name
I/O
Function
WR
PB0
I
Write Pulse (Active low).
XA0
PB1
I
XTAL Action Bit 0
XA1/BS2
PB2
I
XTAL Action Bit 1. Byte Select 2 (“0” selects low byte, “1”
selects 2’nd high byte).
PAGEL/BS1
PB3
I
Byte Select 1 (“0” selects low byte, “1” selects high byte).
Program Memory and EEPROM Data Page Load.
OE
PB5
I
Output Enable (Active low).
RDY/BSY
PB6
O
0: Device is busy programming, 1: Device is ready for new
command.
DATA I/O
PA7-PA0
I/O
Bi-directional Data bus (Output when OE is low).
Table 22-10. Pin Values Used to Enter Programming Mode
Pin
Symbol
Value
PAGEL/BS1
Prog_enable[3]
0
XA1/BS2
Prog_enable[2]
0
XA0
Prog_enable[1]
0
WR
Prog_enable[0]
0
Table 22-11. XA1 and XA0 Coding
XA1
XA0
Action when XTAL1 is Pulsed
0
0
Load Flash or EEPROM Address (High or low address byte determined by BS1).
0
1
Load Data (High or Low data byte for Flash determined by BS1).
1
0
Load Command
1
1
No Action, Idle
VCC
+5V
GND
XTAL1/PB4
PB6
PB5
PB0
PB3
PB1
PB2
PA7 - PA0
DATA
RESET
+12 V
PAGEL/BS1
XA0
XA1/BS2
OE
RDY/BSY
WR
AVCC
+5V



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