KSZ8851-16MQL Micrel Inc, KSZ8851-16MQL Datasheet - Page 37
![Single Ethernet Port + Generic (16-bit) Bus Interface( )](/photos/6/81/68152/576-128-pqfp_sml.jpg)
KSZ8851-16MQL
Manufacturer Part Number
KSZ8851-16MQL
Description
Single Ethernet Port + Generic (16-bit) Bus Interface( )
Manufacturer
Micrel Inc
Specifications of KSZ8851-16MQL
Controller Type
Ethernet Controller, MAC/PHY
Interface
Bus
Voltage - Supply
1.8V, 2.5V, 3.3V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
128-MQFP, 128-PQFP
Operating Supply Voltage (typ)
3.3V
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
128
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
576-3292 - BOARD EVALUATION KSZ8851-16MLL
Current - Supply
-
Lead Free Status / RoHS Status
Compliant, Lead free / RoHS Compliant
Other names
576-3253
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
KSZ8851-16MQLI
Manufacturer:
MICREL
Quantity:
1 001
August 2009
Micrel, Inc.
Host receives an multiple Ethernet pkts
from upper layer and prepares transmit
Write an 1?to RXQCR[3] reg to enable
that the TXQ has completed to transmit
ID). Each transmit queue frame format
This is moving transmit data from Host
Option to read ISR[14] reg, it indicates
write transmit data (control word, byte
count and pkt data) to TXQ memory.
Write an 0?to RXQCR[3] reg to end
pkts data (data, data_length, frame
to issue a transmit command (auto-
enqueue) to the TXQ. The TXQ will
to KSZ8851M TXQ memory until all
TXQ write access, then Host starts
Memory size is available for these
transmit all data to the PHY port
Write an 1?to TXQCR[2] reg
all pkts to the PHY port, then
Figure 9. Host TX Multiple Frames in Auto- Enqueue Flow Diagram
Check if KSZ8851M TXQ
Write 1?to clear this bit
is shown in Table 5
(Read TXMIR Reg)
TXQ write access
pkts are finished
transmit pkts?
Yes
37
No
Yes
word count in TXNTFSR[15:0] register
Write the total amount of TXQ buffer
transmit total frames size in double-
enable the TXQ memory available
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
?
KSZ8851-16/32 MQL/MQLI
No
M9999-083109-2.0