AT88SC0404C-PI Atmel, AT88SC0404C-PI Datasheet - Page 32

• Manufacturer Part Number: AT88SC0404C-PI
• Manufacturer: Atmel

Specifications of AT88SC0404C-PI

• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Package Type: PDIP
• Mounting: Through Hole
• Pin Count: 8
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Not Compliant

7.6.
7.6.1. Write User Zone: $B0
5211C–SMIC–01/10
Atmel AT88SC0104/0204/0404/0808/1616/3216/6416/12816/25616C
Command Descriptions
In the following section operations are described in two parts: the instruction is described first from a functional point of
view (parameters and data exchanged), after which they are detailed for the synchronous two-wire protocol. In these
diagrams, values are shown in binary format with bits to the left transmitted first, i.e. bytes are transmitted most
significant bit first.
Functional
Figure 12. Write User Zone Command Functional Description
The Write User Zone command $B0 allows writing of data in the device's currently selected user zone (the procedure
for selecting a user zone is described below, see “Section 7.6.3,
The data byte address to be written is defined by Address 1 and Address 2 in the command. The value N defines how
many bytes to write. The maximum number of bytes that may be written is as follows;
• $10 for Atmel
• $40 for Atmel AT88SC3216C and Atmel AT88SC6416C (EEPROM page size of 64-bytes)
• $80 for Atmel AT88SC12816C and Atmel AT88SC25616C (EEPROM page size of 128-bytes)
In anti-tearing mode the maximum value for N is $08 for all devices. A write in anti-tearing mode is activated with the
Set User Zone with Anti-Tearing command; all subsequent writes to the user zone will be in anti-tearing mode. A write
may be started in the middle of an EEPROM page but should not extend past the end of the page.
If the host is not allowed to write in the zone, the device will not acknowledge the N-byte. After this command the host
must perform ACK polling unless operating in the encrypted mode, then this command must be followed by the Send
Checksum command.
Figure 13. Write User Zone
S
A
R
T
T
N data bytes
Command
1011 0000
®
AT88SC0104C through Atmel AT88SC1616C (EEPROM page size of 16-bytes)
C
A
K
Number of bytes N
Address 1
xxxx xxxx
Command
Address 1
Address 2
Host
Data
Data
…
A
C
K
Address 2
xxxx xxxx
Device
A
C
K
xxxx xxxx
N
System Write:
C
A
K
d7--- ---d0
Data
$B4” ).
A
C
K
Data x N
d7--- ---d0
A
C
K
O
S
P
T
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