CC3235MODASF datasheet(57/100 Pages) TI1

57 / 100 page

I2CSCL

I2CSDA

CC3235MODAS, CC3235MODASF

www.ti.com

SWRS233 – OCTOBER 2019

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Product Folder Links: CC3235MODAS CC3235MODASF

Specifications

5.19.5.3.1 GPIO Input Transition Time Parameters

Table 5-19 lists the input transition time parameters.

Table 5-19. GPIO Input Transition Time Parameters

MIN

MAX

UNIT

Input transition time (tr, tf), 10% to 90%

(1)

All timing is with 6-mA drive and 20-pF load.

(2)

This value depends on the value programmed in the clock period register of I2C. Maximum output frequency is the result of the minimal

value programmed in this register.

(3)

Because I2C is an open-drain interface, the controller can drive logic 0 only. Logic is the result of external pullup. Rise time depends on

the value of the external signal capacitance and external pullup register.

5.19.5.4 I2C

The CC3235MODAx MCU includes one I2C module operating with standard (100 kbps) or fast (400 kbps)

transmission speeds.

Figure 5-13 shows the I2C timing diagram.

Figure 5-13. I2C Timing Diagram

Table 5-20 lists the I2C timing parameters.

Table 5-20. I2C Timing Parameters(1)

ITEM

NAME

DESCRIPTION

MIN

MAX

UNIT

tLP

Clock low period

See (2)

System clock

tSRT

SCL/SDA rise time

See (3)

tDH

Data hold time

tSFT

SCL/SDA fall time

tHT

Clock high time

See (2)

System clock

tDS

Data setup time

tLP/2

System clock

tSCSR

Start condition setup time

System clock

tSCS

Stop condition setup time

System clock

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