jsh-42l3ad3-5 JDS Uniphase Corporation, jsh-42l3ad3-5 Datasheet - Page 6

• Manufacturer Part Number: jsh-42l3ad3-5
• Description: Sfp Pluggable 4/2/1g Fc/gbe Fp And Dfb Transceiver Rohs 6/6 Jsh-42l3ad3-5, Jsh-42l3ad3-5g, Jsh-42l3ad3-20
• Manufacturer: JDS Uniphase Corporation


Two-wire Data write
To write data to the Digital Diagnostic Monitoring data address of the device
(writes are not allowed to the Serial ID data address), the following sequence must
occur on the Two-wire interface (refer to Two-Wire Interface Figure 1 on page 7,
Two-Wire Interface Figure 2 on page 7, and Two-Wire Interface Figure 3 on page
7 throughout these steps):
1. Send a start signal to the module.
2. Send the data write sequence.
3. Receive an acknowledge signal.
4. Send the address of the first byte to be written during the subsequent se-
5. Receive an acknowledge signal.
6. Send a data byte.
7. Receive an acknowledge signal.
8. Send the next, consecutive data byte (reference Two-Wire Interface Figure 7
A stop signal is presented by toggling the data line from low to high while the clock
is high (see Two-Wire Interface Figure 2 on page 7).
SFP PlUGGABlE 4/2/1G FC/GBE FP AND DFB TRANSCEIvER ROHS 6/6
A start signal is presented by toggling the data line from high to low while the
clock is high (see Two-Wire Interface Figure 2 on page 7).
The write data sequence consists of the bits 0b10100000 for the Serial ID data
or 0b10100010 for the Digital Diagnostic Monitoring information.
One zero bit is the acknowledge signal.
quence.
Valid byte addresses are 0b01101110 for one byte, and byte addresses
0b10000000 thorough 0b11110111.
on page 8), or send a stop signal to stop sending data (reference Two-Wire
Interface Figure 6 on page 8).