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T48C862-R8 Datasheet

  • T48C862-R8

  • MCU

  • Atmel   Atmel

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Figure 89.
FSK Modulation
T3R
0 1 2 3 4 0 1 2 3 4 0 1 2 3 4 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 3 4 0 1
Counter 3
CM31
CM32
SO
T3O
0
1
0
Data EEPROM
The internal data EEPROM offers 2 pages of 512 bits each. Both pages are organized
as 32
16-bit words. The programming voltage as well as the write cycle timing is gen-
erated on chip. To be compatible with the ROM parts, two restrictions have to be taken
into account:
鈥?/div>
To use the same EEPROM page as with the ROM parts the application software has
to write the MCL-command 鈥?9h鈥?to the EEPROM. This command has no effect for
the microcontroller if it is left inside the HEX-file for the ROM version.
Data handling for read and write is performed using the serial interface MCL.
鈥?/div>
The page select is performed by either writing 鈥?1h鈥?(page 1) or 鈥?9h鈥?(page 0) to the
EEPROM.
Figure 90.
Data EEPROM
Timing control
HV-generator
Page 1
V
DD
V
SS
Address
control
EEPROM
Page 0
2 x 32 x 16
--> Write "01h"
--> Write "09h"
Mode
control
16-bit read/write buffer
SCL
SDA
I/O
control
8-bit data register
90
T48C862-R8
4590B鈥?BMCU鈥?2/03

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