ATMEGA163 ATMEL [ATMEL Corporation], ATMEGA163 Datasheet - Page 145

• Manufacturer Part Number: ATMEGA163
• Description: 8-bit Microcontroller with 16K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

Parallel Programming
Signal Names
1142E–AVR–02/03
This section describes how to Parallel Program and verify Flash Program memory,
EEPROM Data memory + Program And Data Memory Lock bits and Fuse bits in the
ATmega163. Pulses are assumed to be at least 500ns unless otherwise noted.
In this section, some pins of the ATmega163 are referenced by signal names describing
their functionality during parallel programming, see Figure 81 and Table 56. Pins not
described in the following table are referenced by pin names.
The XA1/XA0 pins determine the action executed when the XTAL1 pin is given a posi-
tive pulse. The bit coding are shown in Table 57.
When pulsing WR or OE, the command loaded determines the action executed. The
Command is a byte where the different bits are assigned functions as shown in Table
58.
The BS2 pin should be low unless otherwise noted.
Figure 81. Parallel Programming
Table 56. Pin Name Mapping
Programming Mode
Signal Name in
RDY/BSY
BS1
XA0
XA1
WR
OE
RDY/BSY
PAGEL
+12 V
Pin Name
BS2
BS1
XA0
XA1
WR
OE
PD1
PD2
PD3
PD4
PD5
PD6
I/O
PD1
PD2
PD3
PD4
PD5
PD6
RESET
XTAL1
GND
PD7
O
PA0
I
I
I
I
I
ATmega163
Function
0: Device is busy programming, 1: Device is ready
for new command
Output Enable (Active low)
Write Pulse (Active low)
Byte Select 1 (“0” selects low byte, “1” selects high
byte)
XTAL Action Bit 0
XTAL Action Bit 1
PB7 - PB0
AGND
AVCC
VCC
+5V
+5V
ATmega163(L)
DATA
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