UM0434 datasheet(377/390 Pages) STMICROELECTRONICS

377 / 390 page

Nexus3 module

UM0434

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T0, A0 and S0 are the least significant bits, where Tx = TCODE number (fixed); Sx = source processor (fixed); Zx = data size

(fixed); Ax = unique portion of address (variable); Dx = Write data (variable-8,16 or 32-bit).

T0 and S0 are the least significant bits, where Tx = TCODE number (fixed); Sx = source processor (fixed); Ix = number of

instructions (variable); Ax = unique portion of the address (variable).

Table 279 shows an example of a data write message with 8 MDO/1 MSEO configuration, and Table 280

shows the same DWM with 8 MDO/2 MSEO configuration.

T0, A0 and S0 are the least significant bits, where Tx = TCODE number (fixed); Sx = source processor (fixed); Zx = data size

(fixed); Ax = unique portion of address (variable); Dx = Write data (variable-8,16 or 32-bit).

Table 277.

Direct branch message example (2 MDO/1 MSEO)

Clock

nex_mdo[1:0]

nex_mseo_b

State

Idle (or end of last message)

Start message

Normal transfer

End packet

End message

Table 278.

Direct branch message example (8 MDO / 2 MSEO)

Clock

nex_mdo[7:0]

nex_mseo_b[1:0]

State

Idle (or end of last message)

T5T4T3

T2T1T0

Start message

End packet/end message

T5T4T3

T2T1T0

Start message

Table 279.

Data write message example (8 MDO/1 MSEO)

Clock

nex_mdo[7:0]

nex_mseo_b

State

Idle (or end of last message)

T4T3T2

T1T0

Start message

A2A1A0

End packet

D7D6

D5D4D3

D2D1

Normal transfer

000

End packet

000

End message

Table 280.

Data write message example (8 MDO/2 MSEO)

Clock

nex_mdo[7:0]

nex_mseo_b[1:0]

State

Idle (or end of last message)

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