KSZ8841-16MVLI TR Micrel, KSZ8841-16MVLI TR Datasheet - Page 37

• Manufacturer Part Number: KSZ8841-16MVLI TR
• Description: Ethernet ICs Single Ethernet Port + Generic (8, 16-bit) bus interface(Lead Free)
• Manufacturer: Micrel

Specifications of KSZ8841-16MVLI TR

• Rohs: yes
• Product: Ethernet Controllers
• Package / Case: LQFP-128
• Mounting Style: SMD/SMT

BIU Implementation Principles
Since KSZ8841M is an I/O device with 16 addressable locations, address decoding is based on the values of A15-A4 and
AEN. Whenever DATACSN is asserted, the address decoder is disabled and a 32-bit transfer to Data Register is
assumed (BE3N – BE0N are ignored).
If address latching is required, the address is latched on the rising edge of ADSN and is transparent when ADSN=0.
October 2007
Micrel, Inc.
1. Byte, word, and double word data buses and accesses (transfers) are supported.
2. Internal byte swapping is not implemented and word swapping is supported internally. Refer to Figure 11 for the
3. Since independent sets of synchronous and asynchronous signals are provided, synchronous and asynchronous
appropriate 8-bit, 16-bit, and 32-bit data bus connection.
cycles can be mixed or interleaved as long as they are not active simultaneously.
HA[15:2]
HD[7:0]
HA[1]
HA[0]
VDD
EISA
VLBus
ISA
Figure 10. Mapping from the ISA, EISA, and VLBus to the KSZ8841M Bus Interface
8-bit Data Bus
A[1]
A[15:2]
D[7:0]
D[15:8]
BE0N
BE1N
Non-burst
KSZ8841-16
Burst
Figure 11. KSZ8841M 8-Bit, 16-Bit, and 32-Bit Data Bus Connections
Host Interface
Host Interface
Host Interface
Host Interface
HD[15:8]
HA[15:2]
HD[7:0]
nSBHE
HA[1]
HA[0]
(for example: ISA-like)
Note: To use DATACSN & 32-bit only for Central decode
16-bit Data Bus
A[1]
A[15:2]
D[7:0]
D[15:8]
BE0N
BE1N
KSZ8841-16
No Addr Latch
(ADSN = 0)
Address Latch
Address Latch
Central decode
Central decode
(VLBUSN = 1)
37
HD[23:16]
HD[31:24]
KSZ8841M BIU
HD[15:8]
HA[15:2]
nHBE[0]
nHBE[1]
nHBE[2]
nHBE[3]
HD[7:0]
Local
decode
(VLBUSN = 0)
GND
Local
decode
(for example: EISA-like)
KSZ8841-16/32 MQL/MVL/MBL
Asynchronous
Synchronous
32-bit Data Bus
Interface
Interface
KSZ8841-32
A[1]
A[15:2]
BE0N
BE1N
BE2N
BE3N
D[7:0]
D[15:8]
D[23:16]
D[31:24]
M9999-102207-1.6