Datasheet

DS_INLC10AQ Revision 1.0_B

Inova Semiconductors Confidential

Page 13 of 35

4.1.1 Automatic Detection of The Serial Line Mode

During start-up, the devices automatically detect the mode of the upstream and the downstream link. The

upstream link may be either single-ended or differential. If a device detects the upstream to be single-ended,

it is the first in the chain of LEDs. The downstream link may be either differential or unconnected, i.e. the

device is the last in the chain of LEDs. After power-up, an idle of tINIT Idle = 150

μs is recommended before

the initialization. If during the initialization, while receiving the enumeration command, the master SIO_N pin

is single ended high (5V), the device is switched into single ended communication mode for this port. The

detected mode is stored and used for all following communications until a power cycle or a reset command.

Figure 8 - Single ended startup (first device in chain)

Figure 9 - Differential startup (devices in chain >1)

Parameter

Description

Min.

Units

tINIT Idle

Init idle after power up

150

μs

Table 12

– Recommended init idle