KSZ8851SNL-BBE-EVAL Micrel Inc, KSZ8851SNL-BBE-EVAL Datasheet - Page 27

• Manufacturer Part Number: KSZ8851SNL-BBE-EVAL
• Description: BOARD EVAL MAC/PHY FOR KSZ8851
• Manufacturer: Micrel Inc
• Series: LinkMD®r

Specifications of KSZ8851SNL-BBE-EVAL

• Design Resources: BeagleBoard Zippy2
• Main Purpose: Interface, Ethernet Controller (PHY and MAC)
• Embedded: No
• Utilized Ic / Part: KSZ8851SNL
• Primary Attributes: 1 Port, 100BASE-TX/10BASE-T
• Secondary Attributes: SPI Interface, LinkMD Cable Diagnostics
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 576-3602; KSZ8851SNL-BBE-EVL; ZIPPY2

August 2009
Micrel, Inc.
transmit data from Host to KSZ8851SNL
Write an 1?to RXQCR[3] reg to enable
Write an 1?to TXQCR[0] reg to issue a
that the TXQ has completed to transmit
TXQ memory until whole pkt is finished
Option to Read ISR[14] reg, it indicates
upper layer and prepares transmit pkt
to the TXQ. The TXQ will transmit this
data (control word, byte count and pkt
transmit command (manual-enqueue)
at least one pkt to the PHY port, then
TXQ write access, then Host issues a
data) to TXQ memory. This is moving
SPI opcode=11 to start write transmit
Write an 0?to RXQCR[3] reg to end
data (data, data_length, frame ID).
The transmit queue frame format is
Host receives an Ethernet pkt from
Figure 11. Host TX Single Frame in Manual Enqueue Flow Diagram
Memory size is available for this
Check if KSZ8851SNL TXQ
pkt data to the PHY port
Write 1?to clear this bit
(Read TXMIR Reg)
shown in Table 6
TXQ write access
transmit pkt?
Yes
27
No
Yes
Write the total amount of TXQ buffer
transmit frame size in double-word
enable the TXQ memory available
count in TXNTFSR[15:0] register
Set bit 1=1 in TXQCR register to
space which is required for next
(memory space available)
and check if the bit 6=1
Wait for interrupt
in ISR register
monitor
?
KSZ8851SNL/SNLI
M9999-083109-2.0
No