IXF1104
Figure 28. Random Read
| S |
|
|
|
|
|
|
|
| W |
|
|
|
|
|
|
|
|
| S |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
| T |
|
|
|
|
|
|
|
| R |
|
|
|
|
|
|
|
|
| T |
|
|
|
|
|
| R |
|
|
|
|
|
|
|
|
|
| S | ||
| A |
|
| DEVICE |
|
| I |
|
|
| WORD | A |
| DEVICE |
| E |
|
|
|
|
|
|
|
|
|
| T | |||||||||||||
| R |
|
|
|
| T |
|
|
| R |
|
| A |
|
|
|
|
|
|
|
|
|
| O | ||||||||||||||||
| T |
| ADDRESS |
|
| E |
|
| ADDRESS | T | ADDRESS |
| D |
|
|
|
|
|
|
|
|
|
| P | ||||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
I2C_Data Line |
|
|
|
|
|
|
|
|
|
|
| * |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| M |
| L R |
| M |
|
|
|
|
| L A |
| M |
|
|
|
|
| L | A |
|
|
|
|
|
|
|
| N | ||||||||||
|
| B |
| B W START |
| B |
|
|
|
|
| B K |
| B |
|
|
|
|
| B | K |
|
| DATAn |
|
| ||||||||||||||
|
| S |
| S / |
| S |
|
|
|
|
| S | C |
| S |
|
|
|
|
| S | C |
|
|
|
|
|
|
|
| O | |||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| A | |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| C | |
|
|
|
|
|
|
|
| DUMMY WRITE |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| K |
(* = DON'T CARE bit for1k)
5.8LED Interface
The IXF1104 uses a Serial interface, consisting of three signals, to provide LED data to some form of external driver. This provides the data for 12 separate direct drive LEDs and allows three LEDs per MAC port.
There are two modes of operation, each with its own separate LED decode mapping. Modes of operation and LEDs are detailed in the following sections.
5.8.1Modes of Operation
There are two modes of operation: Mode 0 and Mode 1. Mode selection is accomplished by using the LED_SEL_MODE bit. This bit is globally selected and controls the operation of all ports (see Table 109 “LED Control ($0x509)” on page 189).
Mode 0: (LED_SEL_MODE = 0 [Default]): This mode selects operations compatible with the SGS Thompson M5450 LED Display Driver device. This device converts the serial data stream, output by the IXF1104, into 30
Mode 1: (LED_SEL_MODE = 1): This mode is used with standard TTL (74LS599) or HCMOS (74HC599) octal shift registers with latches, providing the most general and
In addition to these physical modes of operation, there are two types of specific LED data decodes available for fiber and copper modes. This option is a global selection and controls the operation of all ports (see Table 109 “LED Control ($0x509)” on page 189).
5.8.2LED Interface Signal Description
The IXF1104 LED interface consists of three output signal signals that are 2.5 V CMOS level pads. Table 31 provides LED signal names, pin numbers, and descriptions.
114 | Datasheet |
Document Number: 278757
Revision Number: 007
Revision Date: March 25, 2004