Intel IXP46X ユーザーズマニュアル
Intel
®
IXP45X and Intel
®
IXP46X Product Line of Network Processors—General Hardware
Design Considerations
Intel
®
IXP45X and Intel
®
IXP46X Product Line of Network Processors
HDD
February 2007
26
Document Number: 305261; Revision: 004
Figure 4.
8/16/32-Bit Device Interface: Byte Enable
EX_ADDR[24:0]
EX_DATA[7:0]
8-Bit Device
Byte Access
CS
OE
WR0
EX_ADDR[24:0]
EX_DATA[31:0]
EX_CS_N
EX_RD_N
EX_BE_N0
CS_N
OE_N
WR_N
DATA[7:0]
ADDR[24:0]
EX_ADDR[24:0]
EX_DATA[15:0]
16-Bit Device
16-Bit-Word Access
CS
OE
WR0
EX_ADDR[24:0]
EX_DATA[31:0]
EX_CS_N
EX_RD_N
EX_BE_N0
CS_N
OE_N
WR_N0
DATA[15:0]
ADDR[24:0]
EX_ADDR[24:0]
EX_DATA[31:0]
32-Bit Device
32-Bit-Word Access
CS
OE
WR0
EX_ADDR[24:0]
EX_DATA[31:0]
EX_CS_N
EX_RD_N
EX_BE_N0
CS_N
OE_N
WR_N0
DATA[31:0]
ADDR[24:0]
WR1
EX_BE_N1
WR_N1
WR1
EX_BE_N1
WR_N1
WR2
EX_BE_N2
WR_N2
WR3
EX_BE_N3
WR_N3
Intel
®
IXP46X
Product Line of
Network Processors
Intel
®
IXP46X
Product Line of
Network Processors
Intel
®
IXP46X
Product Line of
Network Processors
B4096-003