AT88SC0104C datasheet(44/58 Pages) ATMEL

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5210B–SMIC–11/08

AT88SC0104/0204/0404/0808/1616/3216/6416/12816/25616C

8.5.2

Read User Zone: $B2

8.5.2.1

Functional

Figure 8-2.

Read User Zone Command Functional Description

The Read User Zone command $B2 allows reading of data from the device's currently selected

user zone (the procedure for selecting a user zone is described below under Section 8.5.3.4 on

page 43). The byte address is internally incremented following the transmission of each data

byte. During a read operation the address will "roll over" from the last byte of the current zone, to

the first byte of the same zone.

If the host is not allowed to read the zone, the device will return the "Command Unauthorized"

code ($69 $00) after it has received the header.

Device

Read Command

Address A1

Address A2

Number of Bytes N

Host

N data bytes

Data

...

Data

Table 8-6.

Read User Zone

User Read

Data Returned

CLA

INS :

Command

P1 : Address

P2: Address

P3 : N

Data(1)

...

Data(N)

$B2

0000 0000

0a6-- ---a0

n7 --- n0

d7--- ---d0

...

d7--- ---d0

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