ASI4U datasheet(29/71 Pages) RENESAS

29 / 71 page

ASI4U / ASI4U-E / ASI4U-F Datasheet

January 26, 2016

Table 4.4

IRD Current/Voltage Mode Switching

PARAMETER

SYMBOL

CONDITIONS

MIN

MAX

UNIT

Minimum IRD input voltage to activate CMOS

Input Mode of IRD pin

VIRD_VM

2.5

Maximum IRD input voltage to activate AC Current

Input Mode of IRD pin

VIRD_CM

1.0

Filter time constant for IRD input mode switching

tIRD_Mode_Filter

7.68

8.192

The following input levels apply in CMOS Input Mode:

Table 4.5

IRD CMOS Input Mode Levels

PARAMETER

SYMBOL

CONDITIONS

MIN

MAX

UNIT

Input voltage range

VIRD_IN

-0.3

VUout

Voltage range for input LOW level

VIRD_IL

1.0

Voltage range for input HIGH level

VIRD_IH

2.5

VUout

Rise or fall time

tr or tf

100

In Master Mode, the rise/fall time of the IRD input signal should be as low as possible in order to avoid jitter on the AS-i line.

4.3.4.

Master, Repeater, and Monitor Modes

In the Master, Repeater, and Monitor Modes, the IRD input is always configured in CMOS Input Mode. The input

levels specified in Table 4.5 apply.

The expected polarity of the Manchester-II-coded bit stream at the IRD pin depends on the values of the DI0 and

DI1 pins.

Table 4.6

Polarity of Manchester-II Signal at IRD in Master Mode

INPUT VALUES AT DI0 AND DI1

DESCRIPTION

Equal (“11” or “00”)

The Manchester-II signal is active LOW (default logic output value at no communication

is 1). This mode is compatible with the A²SI IRD input.

Unequal (“01” or “10”)

The Manchester-II signal is active HIGH (default logic output value at no communication

is 0).

Note: The complemented definition was chosen to retain backward compatibility to A²SI-based AS-i Master

designs.

ASI4U bảng dữ liệu(PDF) 29 Page - Renesas Technology Corp

ASI4U bảng dữ liệu(HTML) 29 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71

bảng dữ liệu tải về

Link URL