atmega161-4pi ATMEL Corporation, atmega161-4pi Datasheet - Page 121

• Manufacturer Part Number: atmega161-4pi
• Description: 8-bit Microcontroller With 16k Bytes Of In-system Programmable Flash
• Manufacturer: ATMEL Corporation

1228D–AVR–02/07
1. Give WR a negative pulse. This starts programming of the entire page of data.
2. Wait until RDY/BSY goes high.
J. End Page Programming
1. Set XA1, XA0 to “10”. This enables command loading.
2. Set DATA to “0000 0000”. This is the command for No Operation.
3. Give XTAL1 a positive pulse. This loads the command, and the internal write sig-
K. Repeat “A” through “J” 128 times or until all data have been programmed.
Figure 76. Programming the Flash Waveforms
Figure 77. Programming the Flash Waveforms (Continued)
RDY/BSY
RDY/BSY
RESET
PAGEL
XTAL1
RESET
PAGEL
DATA
XTAL1
RDY/BSYgoes low.
(See Figure 77 for signal waveforms.)
nals are reset.
DATA
XA1
XA2
BS1
BS2
WR
OE
XA1
XA0
BS1
BS2
WR
OE
+12V
+12V
DATA HIGH
$10
ADDR. LOW
ADDR. HIGH
DATA LOW
ATmega161(L)
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