SLE4428 Datasheet, PDF (8/17 Pages) Siemens Semiconductor Group – ICs for Chip Cards

SLE 4418
SLE 4428
Figure 2
Reset and Answer-to-Reset
The possible commands are listed in table 1.
Table 1
Control Words for Command Entry
Byte 1
Byte 2 Byte 3
Operation
S0 S1 S2 S3 S4 S5 A8 A9 A0-A7 D0-D7
10 0011
Input data Write and erase with protect bit
1 1 0 0 1 1 ^{Address Address} Input data Write and erase without protect bit
bit
bit
00 0011
Comparison Write protect bit with data
data
comparison (verification)
0 0 1 1 0 0 8 and 9 0 – 7 No effect Read 9 bits, data with protect bit
01 1100
No effect Read 8 bits, data without protect bit
Figure 3 shows the command entry, whereas the general timing is given in figure 4.
Semiconductor Group
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