ITR-D3T-SD6-A

DS-5863 Rev 01

Table 8 - Microcontroller Specifications

Parameter

Minimum

Typical

Maximum

Unit

Notes

Operating Voltage

3.14

3.30

3.46

V

SDA

a

-

-

-

-

LVTTL, open collector serial data line from the I

bus to the on board Microcontroller.

SCL

b

-

-

-

-

LVTTL, open collector serial clock line from the I

2

C

bus to the on board Microcontroller.

Reset hold

c

30

-

-

ms

LVTTL input, internal 50kΩ pull-up. Active Low

Interrupt

-

-

-

-

LVTTL output, internal 100kΩ pull-up. Active Low

Table 9 – Suggested Start-up Sequence

Step

Action

1

Power up the host system, with the RESET pin pulled to ground via a

≤4.7kΩ resistor.

2

Drive the RESET pin LOW.

3

Set the BEN control lines to disable the transmitter (BEN lines must be driven with differential logic).

4

Ensure power to the unit is on.

5

Drive the RESET pin HIGH to release the unit to become operational.

6

Wait approximately 250ms until the INTERRUPT pin goes LOW.

7

Read bytes A2.70/71/74/75 to clear the interrupt condition. Verify that byte A2.75 bit 7 was set. Use multi-byte read of bytes

70/71 and bytes 74/75.

8

Wait 50ms. Verify that the INTERRUPT pin has changed to HIGH.

9

The unit is now ready for normal operation.

Figure 2 - Recommended transceiver module start-up sequence