INT5130 datasheet(21/38 Pages) ETC1

21 / 38 page

INTELLON CONFIDENTIAL

ADVANCE INFORMATION

Rev 8.1

INT5130 Integrated Powerline MAC/PHY Transceiver Technical Data Sheet

GPSI Interface with SPI Control

The General Purpose Serial Interface (GPSI) is a flexible, bi-directional serial interface that can be utilized in

place of the MII. It provides a straightforward interface to a communications controller through a synchronous

serial data stream for transmit and receive data. When using the GPSI interface, the management interface

can either be MDI or SPI, selected by the MDI_SPIS_N pin. The information that follows describes the GPSI

communication interface along with the SPI management interface as a typical example.

External

Host

Controller

GPSI_RXCLK

GPSI_TXCLK

GPSI_TXEN

GPSI_COL

GPSI_TXD

GPSI_RXD

INT5130

GPSI_RXEN

GPSI_TXBSY

SPIS_SDO

SPIS_SDI

SPIS_SCLK

SPIS_CS_N

Figure 14: GPSI Data Interface with SPI Control

GPSI Interface

GPSI is an interoperable interface providing a simple interconnection between the INT5130 and embedded

microcontrollers. Data is transferred between the host controller and the INT5130 over separate 1-bit

transmit and receive data paths synchronous with clock signals supplied to the host by the INT5130.

GPSI Timing Diagrams

The figures below show the transmission and reception of packets and the corresponding behavior of

the GPSI interface. A packet is transferred from the host when GPSI_TXEN goes high. An

unsuccessful attempt is made to transmit a packet in Case 5. The received packet is passed to the

host when GPSI_RXEN is high.

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