IDT88P8344 Integrated Device Technology, IDT88P8344 Datasheet - Page 16

• Manufacturer Part Number: IDT88P8344
• Description: Spi Exchange 4 X Spi-3 To Spi-4 Issue 1.0
• Manufacturer: Integrated Device Technology

SPI-3 egress Link mode
indicates its ability to receive data. Status information for all logical ports is directed
towards the packet fragment processor.
associated to LIDs ranging from 0 up to POLL_LENGTH to find logical ports that
SPI-3 egress PHY mode
as long as the E_ENB signal is asserted. The SPI-3 packet fragment processor
transfers data to the SPI-3 egress buffers.
IDT88P8344 SPI EXCHANGE 4 x SPI-3 TO SPI-4
The SPI Exchange receives status information from the PHY. The PHY
Status information is received from the PHY.
In PHY mode, the SPI Exchange sends data to the attached Link-mode device

In packet mode, the SPI Exchange polls the PHY for the logical ports
LINK
PHY
Figure 5. Link mode SPI-3 egress interface
Figure 6. PHY mode SPI-3 egress interface
E_FCLK
DTPA[3:0]
STPA
PTPA
ADDR[7:0]
E_ERR
E_Data[31:0]
E_PRTY
E_SOP
E_EOP
E_RSX
E_MOD[1:0]
E_ENB
E_FCLK
E_ERR
E_Data[31:0]
E_PRTY
RVAL
E_SOP
E_EOP
E_RSX
E_MOD[1:0]
E_ENB
16
can accept data. The POLL_LENGTH field is defined in the SPI-3 egress
configuration register.
sor if enabled by the BURST_EN flag. When the BURST_EN flag is cleared
the only one packet fragment per LP is allowed into the SPI-3 egress buffers.

This status information is directly forwarded to the packet fragment proces-
In byte mode the SPI Exchange allows for direct status detection.
(LINK MODE)
IDT88P8344
(PHY MODE)
byte mode
packet mode
IDT88P8344
6370 drw38
INDUSTRIAL TEMPERATURE RANGE
6370 drw39
APRIL 10, 2006