FTR-1621-47 FINISAR [Finisar Corporation.], FTR-1621-47 Datasheet - Page 7

• Manufacturer Part Number: FTR-1621-47
• Description: WDM Multi-rate GBIC Transceiver with APD Receiver
• Manufacturer: FINISAR [Finisar Corporation.]

FTR-1621-XX WDM GBIC
VIII. Serial Communication Protocol
All Finisar optical GBICs are ‘Module Definition “4”’ and support the 2 wire serial
communication protocol outlined in the GBIC Specification
Atmel AT24C01A 128 byte E
interfacing with the E
Wire Serial CMOS E
All Finisar optical GBICs also incorporate a microcontroller that monitors system
parameters such as laser current, laser temperature, and, in the case of
13xx/14xx/15xx/16xx nm parts, transmitted power. For a complete description of how to
use Finisar’s extended features, see Finisar’s Application Note AN-2030
CAUTION: The microcontroller implements the Philips I
details, consult the Philips I
with a slow slave device, and it requires that the host monitor the clock line every time it releases the line
high. If a host does not implement clock stretching (drives the bus blind), it must run the clock below
8kHz, so that Finisar’s microcontroller has time to process instructions. If clock stretching is supported, the
clock may be run at up to 100kHz.
© Finisar Corporation 01-Mar-02 Rev.F
I
Parameter
Atmel I
Finisar Microcontroller
I
Finisar Microcontroller
I
2
2
2
C Clock Rate
C Clock Rate
C Timing Requirements
2
C Clock Rate
2
2
PROM.”
Symbol
PROM, see the Atmel data sheet titled “AT24C01A/02/04/08/16 2-
2
C
C-Bus Specification. Clock stretching allows a fast master to communicate
C
C
atmel
1
2
2
Product Specification - March 2002
PROM (with an address of 1010000X). For details on
5
Min
Table 9. I
10
10
0
Typ
2
C timing requirements
100,000
100,000
8000
Max
2
C protocol including clock stretching. For
Units Notes/Conditions
Hz
Hz
Hz
Bus can be driven blind.
Host must support clock stretching.
Microcontroller times out if C <
10Hz.
Bus can be driven blind.
Microcontroller times out if C <
10Hz.
1
. These GBICs use an
4
.
F i n i s a r
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