S6E1C3 Datasheet, PDF (89/107 Pages) Cypress Semiconductor – 32-bit ARM® Cortex®-M0+ FM0+ Microcontroller

S6E1C3 Series
TxD+
Full-speed buffer
Rs
28 Ω to 44 Ω equivalent impedance
TxD-
3-state enable
Rs
28 Ω to 44 Ω equivalent impedance
Mount it as external resistance.
Rs series resistor 25 Ω to 30 Ω
Series resistor of 27 Ω (recommendation value) must be added.
And, use “resistance with an uncertainty of 5% by E24 sequence”.
*7 : They indicate rising time (Trise) and falling time (Tfall) of the low-speed differential data signal.
They are defined by the time between 10% and 90% of the output signal voltage.
D+
90%
90%
10%
D-
Trise
Rising time
10%
Tfall
Falling time
See “Low-speed load (Compliance Load)” for condition of external load.
Document Number: 002-00233 Rev.*B
Page 89 of 107