DS1963S datasheet(21/37 Pages) DALLAS

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DS1963S

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SHA-1 Input Message Formats Table 2

Read Authenticated Page command, Compute Challenge function

M0[31:24] = (SS+0)

M0[23:16] = (SS+1)

M0[15:8] = (SS+2)

M0[7:0] = (SS+3)

M1[31:24] = (PP+0)

M1[23:16] = (PP+1)

M1[15:8] = (PP+2)

M1[7:0] = (PP+3)

M2[31:24] = (PP+4)

M2[23:16] = (PP+5)

M2[15:8] = (PP+6)

M2[7:0] = (PP+7)

M3[31:24] = (PP+8)

M3[23:16] = (PP+9)

M3[15:8] = (PP+10)

M3[7:0] = (PP+11)

M4[31:24] = (PP+12)

M4[23:16] = (PP+13)

M4[15:8] = (PP+14)

M4[7:0] = (PP+15)

M5[31:24] = (PP+16)

M5[23:16] = (PP+17)

M5[15:8] = (PP+18)

M5[7:0] = (PP+19)

M6[31:24] = (PP+20)

M6[23:16] = (PP+21)

M6[15:8] = (PP+22)

M6[7:0] = (PP+23)

M7[31:24] = (PP+24)

M7[23:16] = (PP+25)

M7[15:8] = (PP+26)

M7[7:0] = (PP+27)

M8[31:24] = (PP+28)

M8[23:16] = (PP+29)

M8[15:8] = (PP+30)

M8[7:0] = (PP+31)

M9[31:24] = (CC+0)

M9[23:16] = (CC+1)

M9[15:8] = (CC+2)

M9[7:0] = (CC+3)

M10[31:24] = MP

M10[23:16] = FAMC

M10[15:8] = SN0

M10[7:0] = SN1

M11[31:24] = SN2

M11[23:16] = SN3

M11[15:8] = SN4

M11[7:0] = SN5

M12[31:24] = (SS+4)

M12[23:16] = (SS+5)

M12[15:8] = (SS+6)

M12[7:0] = (SS+7)

M13[31:24] = (SP+20) M13[23:16] = (SP+21) M13[15:8] = (SP+22)

M13[7:0] = 80h

M14[31:24] = 00h

M14[23:16] = 00h

M14[15:8] = 00h

M14[7:0] = 00h

M15[31:24] = 00h

M15[23:16] = 00h

M15[15:8] = 01h

M15[7:0] = B8h

Legend

Input buffer of SHA engine

£ t £ 15; 32-bit words

Starting address of secret

See Figure 5, Memory Map, memory pages 16 and 17

Starting address of cycle counter

Read Authenticated Page Command: Write cycle counter of selected memory page,

see Figure 5, Memory Map, memory page 19; the LS-byte of the counter is stored at

the lower address

Compute Challenge: PRNG Counter; see Figure 5, Memory Map, memory page 21;

the LS-byte of the counter is stored at the lower address

Starting address of memory page

See Figure 5, Memory Map, memory pages 0 through 15

FAMC

Family Code = 18h

MP[7] = Control bit M, see Figure 7, Read Authenticated Page, and Figure 8

MP[6] = Control bit X, see Figure 7, Read Authenticated Page, and Figure 8

MP[5:4] = 00b

MP[3:0] = T8:T5 (equivalent to page number in hex)

SNx

ROM Serial number of device

SN0 = least significant byte, SN5 = most significant byte

The CRC is not used

(SP+n)

Byte n of scratchpad

The counting of n is in decimal

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