atmega323l ATMEL Corporation, atmega323l Datasheet - Page 189

• Manufacturer Part Number: atmega323l
• Description: Atmega323 8-bit Avr Microcontroller With 32k Bytes Of In-system Programmable Flash
• Manufacturer: ATMEL Corporation

1457G–AVR–09/03
Figure 93. Parallel Programming
Table 64. Pin Name Mapping
Table 65. XA1 and XA0 Coding
Programming Mode
XA1
Signal Name in
0
0
1
1
RDY/BSY
PAGEL
DATA
BS1
XA0
XA1
BS2
WR
OE
XA0
0
1
0
1
RDY/BSY
PAGEL
Action When XTAL1 is Pulsed
Load Flash or EEPROM Address (High or Low Address Byte
Determined by BS1)
Load Data (High or Low Data Byte for Flash Determined by BS1)
Load Command
No Action, Idle
+12 V
PB7 - 0
Name
BS1
XA0
XA1
BS2
WR
PD1
PD2
PD3
PD4
PD5
PD6
PD7
OE
PA0
Pin
I/O
I/O
O
PD1
PD2
PD3
PD4
PD5
PD6
PD7
RESET
XTAL1
GND
PA0
I
I
I
I
I
I
I
ATmega323
Function
0: Device is Busy Programming, 1: Device is
Ready for New Command
Output Enable (Active Low)
Write Pulse (Active Low)
Byte Select 1 (
High Byte)
XTAL Action Bit 0
XTAL Action Bit 1
Program Memory Page Load
Byte Select 2 (
nd High Byte)
Bidirectional Data Bus (Output When OE is Low)
PB7 - PB0
VCC
“0”
“0”
+5V
Selects Low Byte,
Selects Low Byte,
ATmega323(L)
DATA
“1”
“1”
Selects 2
Selects
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