at90pwm81-16se ATMEL Corporation, at90pwm81-16se Datasheet - Page 257

• Manufacturer Part Number: at90pwm81-16se
• Description: 8-bit Avr Microcontroller With 8k Bytes In- System Programmable Flash
• Manufacturer: ATMEL Corporation

22.7.5
7734M–AVR–03/10
Programming the EEPROM
J. End Page Programming
Figure 22-2.
Note:
Figure 22-3.
Note:
The EEPROM is organized in pages, see
program data is latched into a page buffer. This allows one page of data to be programmed simultane-
ously. The programming algorithm for the EEPROM data memory is as follows (refer to
the Flash” on page 256
1.
2.
3.
RESET +12V
1. Set XA1, XA0 to “10”. This enables command loading.
Set DATA to “0000 0000”. This is the command for No Operation.
Give XTAL1 a positive pulse. This loads the command, and the internal write signals are reset.
PAGEL/BS1
RDY/BSY
XA1/BS2
1. PCPAGE and PCWORD are listed in
XTAL1
1. “XX” is don’t care. The letters refer to the programming description above.
DATA
XA0
WR
OE
PROGRAM MEMORY
Addressing the Flash Which is Organized in Pages
Programming the Flash Waveforms
PROGRAM
COUNTER
PAGE
0x10
A
PAGE ADDRESS
WITHIN THE FLASH
ADDR. LOW
for details on Command, Address and Data loading):
B
PCMSB
DATA LOW
C
PCPAGE
DATA HIGH
D
Table 22-12 on page
XX
E
Table 22-11 on page
PAGEMSB
ADDR. LOW
PCWORD
B
(1)
WORD ADDRESS
WITHIN A PAGE
DATA LOW
C
F
DATA HIGH
INSTRUCTION WORD
254. When programming the EEPROM, the
D
254.
PAGE
(1)
XX
E
ADDR. HIGH
G
AT90PWM81
H
PCWORD[PAGEMSB:0]:
XX
00
01
02
PAGEEND
“Programming
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