ST10F269 datasheet(158/160 Pages) STMICROELECTRONICS

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ST10F269

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21.4.14.2 Slave mode

VCC = 5V ±10%, VSS = 0V, CPU clock = 40MHz, TA = -40 to +125°C, CL = 50pF

The formula for SSC Clock Cycle time is: t310 = 4 TCL * (<SSCBR> + 1)

Where <SSCBR> represents the content of the SSC Baud rate register, taken as unsigned 16-bit integer.

Notes: 1. The phase and polarity of shift and latch edge of SCLK is programmable. This figure uses the leading clock edge as shift edge (drawn

in bold), with latch on trailing edge (SSCPH = 0b), Idle clock line is low, leading clock edge is low-to-high transition (SSCPO = 0b).

2. The bit timing is repeated for all bits to be transmitted or received.

Symbol

Parameter

Maximum Baud rate=10MBd

(<SSCBR> = 0001h)

Variable Baud rate

(<SSCBR>=0001h-FFFFh)

Unit

Minimum

Maximum

Minimum

Maximum

t310 SR SSC clock cycle time

100

8 TCL

262144 TCL

t311 SR SSC clock high time

–

t310/2 - 10

–ns

t312 SR SSC clock low time

–

t310/2 - 10

–ns

t313 SR SSC clock rise time

–

t314 SR SSC clock fall time

–

t315 CC Write data valid after shift edge

–

2 TCL + 14

t316 CC Write data hold after shift edge

–

t317p SR Read data setup time before latch edge,

phase error detection on (SSCPEN = 1)

–

4TCL + 12

–

t318p

SR Read data hold time after latch edge,

phase error detection on (SSCPEN = 1)

–

6TCL + 12

–

t317 SR Read data setup time before latch edge,

phase error detection off (SSCPEN = 0)

6–

–

t318 SR Read data hold time after latch edge,

phase error detection off (SSCPEN = 0)

–

2TCL + 6

–

Figure 82 : SSC Slave Timing

313

314

315

316

1st Out Bit

Last Out Bit

2nd Out Bit

310

312

311

317

2nd.In Bit

1st.In Bit

318

317

Last.In Bit

318

SCLK

MRST

MTSR

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