參數(shù)資料
型號(hào)： IBM42P21LNYAA10
廠商： IBM Microeletronics
英文描述： 1x Fibre Channel Small Form Factor Hot-Pluggable Transceiver(1x吉位光纖通道小格式可帶電插收發(fā)器)
中文描述： 1X的光纖通道纖巧熱插拔收發(fā)器（1倍吉位光纖通道小格式可帶電插收發(fā)器）
文件頁(yè)數(shù)： 6/34頁(yè)
文件大?。?/td> 180K
代理商： IBM42P21LNYAA10
IBM42P21SNYAA10
IBM42P21LNYAA10
2x / 1x Fibre Channel Small Form Factor Hot-Pluggable Transceiver
Page 6 of 31
08/15/00
MOD_DEF(0:2)
A two-wire serial EEPROM is used to hold 128 bytes of information that describe some of the capabilities,
standard interfaces, manufacturer, and other information relevant to the product. The information stored in
the EEPROM is protected so that it cannot be changed by the user. Tables describing the specific addresses
and values of the Serial ID data are included in Serial ID Data and Descriptions on page 20. Operation of the
Serial ID function is described in Serial Module Definition Protocol (Serial ID) on page 8. Signal timings nec-
essary for proper operation of the Serial ID function are shown in Serial ID Timing Specifications on page 25.
The Serial ID module requires both serial clock (SCL) and serial data I/O (SDA) connections. These signals
are required to have pull up resistors (4.7k
is the recommended value; however, a smaller value may be
needed in order to meet the Serial ID’s rise and fall time requirements). The following list and figure show the
necessary connections from an interface to a SFF to ensure the capability of reading the Serial ID data.
MOD_DEF(0): Logic Low
MOD_DEF(1): SCL
MOD_DEF(2): SDA
The serial clock (SCL) and the serial data (SDA) lines appear as NC to the host system upon initial power up.
Expected Connections to SFF MOD_DEF Pins
Interface
MOD_DEF(0)
MOD_DEF(1)
MOD_DEF(2)
SCL
SDA
Host
SFF
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