9.4.4.1 Functional

Figure 9-3. Read User Zone Command Functional Description

The Read User Zone command $B2 allows data to be read from the device's currently selected user zone (the procedure for selecting a user zone is described in section 9.4.5 System Write: $B4. 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.

Table 9-5. Read User Zone

User Read

Data Returned

CLA

INS : Command

P1 : Address 1

P2 : Address 2

P3 : N

Data(1)

...

Data(N)

**

$B2

0000 0000

0a6-- ---a0

N7 --- n0

d7--- ---d0

...

d7--- ---d0