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SDAn

SCLn

VIH

VIL

tSTAH

tSCLH

tSCLL

P*1

S*1

tSf

tSr

tSCL

tSDAH

tSDAS

tSTAS

tSP

tSTOS

P*1

tBUF

Sr*1

Note:

n = 0

Note 1. S, P, and Sr indicate the following conditions:

S: Start condition

P: Stop condition

Sr: Restart condition

Figure 2.42

I2C bus interface input/output timing

2.4

USB Characteristics

2.4.1

USBFS Timing

Table 2.31

USBFS low-speed characteristics for host only (USB_DP and USB_DM pin characteristics)

Conditions: VCC = AVCC0 = VCC_USB = VBATT = 3.0 to 3.6V, 2.7 ≤ VREFH0/VREFH ≤ AVCC0, USBCLK = 48 MHz

Parameter

Symbol

Min

Typ

Max

Unit

Test conditions

Input

characteristics

Input high voltage

VIH

2.0

—

Input low voltage

VIL

—

0.8

—

Differential input sensitivity

VDI

0.2

—

| USB_DP - USB_DM |

Differential common-mode range

VCM

0.8

—

2.5

—

Output

characteristics

Output high voltage

VOH

2.8

—

3.6

IOH = –200 µA

Output low voltage

VOL

0.0

—

0.3

IOL = 2 mA

Cross-over voltage

VCRS

1.3

—

2.0

Figure 2.43

Rise time

tLR

—

300

Fall time

tLF

—

300

Rise/fall time ratio

tLR / tLF

—

125

tLR/ tLF

Pull-up and

pull-down

characteristics

USB_DP and USB_DM pull-down

resistance in host controller mode

Rpd

14.25

—

24.80

kΩ

—

RA4E1 Datasheet

2. Electrical Characteristics

R01DS0391EJ0130 Rev.1.30

Jun 6, 2025

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