DS28E05P+T Maxim Integrated, DS28E05P+T Datasheet - Page 9
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DS28E05P+T
Manufacturer Part Number
DS28E05P+T
Description
EEPROM 1W 1KB FTP MEMORY TSOC
Manufacturer
Maxim Integrated
Datasheet
1.DS28E05PT.pdf
(17 pages)
Specifications of DS28E05P+T
Rohs
yes
Memory Size
1 KB
Organization
7 Pages x 16
Data Retention
10 yr
Maximum Operating Current
20 uA
Operating Supply Voltage
3.3 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
TSOC-6
Interface Type
1-Wire
Minimum Operating Temperature
- 40 C
Operating Current
20 uA
Supply Voltage - Max
+ 4 V
Supply Voltage - Min
- 0.5 V
Part # Aliases
90-2805V+000
DS28E05
Write Memory [55h]
The Write Memory command is used to program one or more contiguous 2-byte segments of a memory page. This com-
mand is applicable only to memory locations that are not write protected. The parameter byte specifies the page and
segment number where the writing begins. The new segment data is transmitted in the sequence B0, B1. Table 2
the how these bytes map to the addressed memory page. The command flow allows writing one or multiple adjacent
segments within a page. To safeguard against transmission errors, the DS28E05 supports read-after-write verification.
In case of data error, the master aborts the command by issuing a 1-Wire reset. To start the transfer to EEPROM the
master must transmit a release byte (FFh). After the programming time is over, the DS28E05 transmits a CS byte. If a
page is in EPROM emulation mode, the new segment data is the bitwise AND of the segment data in memory and the
new data provided with the command.
Table 3. Parameter Byte Bitmap
Note: The bits marked as 0 must be transmitted as 0 for the parameter byte to be valid.
Bits 6:4: Memory Page Selection (PAGE #). These bits specify the memory page that is to be written to. Valid memory
page numbers are 000b (page 0) to 111b (page 7).
Bits 3:1: Starting Segment Selection (SEG #). These bits specify the location within the selected memory page where
the writing begins. For pages 0 to 6 valid segment numbers are 000b (start of memory page) to 111b (last segment of
memory page). Valid segment numbers for page 7 are 000b, 001b, and 010b.
www.maximintegrated.com
Write Memory
Command Code
Parameter Byte
Restrictions
Protocol Variations
Error conditions
CS Byte
BIT 7
0
BIT 6
55h
Target page selection, starting segment number (Table 3).
The memory page must not be write protected.
Writing within a page.
Writing through the end of the page.
Invalid parameter byte.
The memory page is write protected.
AAh = success.
33h = The command failed because the page is write protected.
PAGE #
BIT 5
BIT 4
BIT 3
SEG #
BIT 2
1-Wire EEPROM
BIT 1
Maxim Integrated │ 9
BIT 0
0
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