STR750FV0 datasheet(68/84 Pages) STMICROELECTRONICS

68 / 84 page

Electrical parameters

STR750Fxx STR751Fxx STR752Fxx STR755Fxx

68/84

SMI - serial memory interface

Subject to general operating conditions with CL

≈ 30 pF.

Figure 39.

SMI timing diagram

I2C - Inter IC control interface

Subject to general operating conditions for VDD_IO, fPCLK, and TA unless otherwise specified.

The I2C interface meets the requirements of the Standard I2C communication protocol

described in the following table with the restriction mentioned below:

Restriction: The I/O pins which SDA and SCL are mapped to are not “True” Open-

Drain: when configured as open-drain, the PMOS connected between the I/O pin and

VDD_IO is disabled, but it is still present. Also, there is a protection diode between the

I/O pin and VDD_IO. Consequently, when using this I

2C in a multi-master network, it is

Table 40.

SMI characteristics(1)

Data based on characterisation results, not tested in production.

Symbol

Parameter

Min

Max

Unit

fSMI_CK

SMI clock frequency

32(2)(3)

Max. frequency = fPCLK/2 = 64/2 = 32 MHz.

Valid for all temperature ranges: -40 to 105 °C, with 30 pF load capacitance.

MHz

48(4)

Valid up to 60 °C, with 10 pF load capacitance.

tr(SMI_CK)

SMI clock rise time

tf(SMI_CK)

SMI clock fall time

tv(SMI_DOUT) Data output valid time

th(SMI_DOUT) Data output hold time

tv(SMI_CSSx) CSS output valid time

th(SMI_CSSx) CSS output hold time

tsu(SMI_DIN) Data input setup time

th(SMI_DIN)

Data input hold time

SMI_DOUT OUTPUT

SMI_DIN INPUT

tc(SMI_CK)

tw(SMI_CKH)

tw(SMI_CKL)

th(SMI_DIN)

tsu(SMI_DIN)

tv(SMI_DOUT)

th(SMI_DOUT)

MSB IN

MSB OUT

BIT6 IN

BIT6 OUT

LSB OUT

LSB IN

tr(SMI_CK)

tf(SMI_CK)

SMI_CK OUTPUT

SMI_CSSX OUTPUT

tv(SMI_CSS)

th(SMI_CSS)

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