2/24/2008 9T6WP
Preliminary Hardware Data Module
BCM7405
06/29/07
Hardware Signal Descriptions
Bro a d c o m Co rp o r a ti o n
Document
7405-1HDM00-R
Pin Definition Notations Page 1-101
1
12 - Clocks
DDR_EXT_CL
K
I/O
Ext PU
SSTL
_18
–
E6
DDR DRAM External Clock
1
14 - 64 Bit DDR2
SDRAM
DDR0_CLK
O
Ext PU
SSTL
_18
–
AH4
DDR DRAM clocks for 16-
bit lane 0
1
14 - 64 Bit DDR2
SDRAM
DDR0_CLKb
O
Ext PU
SSTL
_18
–
AH5
DDR DRAM clocks (low
active) for 16-bit lane 0
1
14 - 64 Bit DDR2
SDRAM
DDR1_CLK
I/O
Ext PU
SSTL
_18
–
AC1
DDR DRAM clocks for 16-
bit lane 1
1
14 - 64 Bit DDR2
SDRAM
DDR1_CLKb
I/O
Ext PU
SSTL
_18
–
AC2
DDR DRAM clocks (low
active) for 16-bit lane 1
1
14 - 64 Bit DDR2
SDRAM
DDR2_CLK
I/O
Ext PU
SSTL
_18
–
M4
DDR DRAM clocks for 16-
bit lane 2
1
14 - 64 Bit DDR2
SDRAM
DDR2_CLKb
I/O
Ext PU
SSTL
_18
–
M5
DDR DRAM clocks (low
active) for 16-bit lane 2
1
14 - 64 Bit DDR2
SDRAM
DDR3_CLK
I/O
Ext PU
SSTL
_18
–
E1
DDR DRAM clocks for 16-
bit lane 3
1
14 - 64 Bit DDR2
SDRAM
DDR3_CLKb
I/O
Ext PU
SSTL
_18
–
E2
DDR DRAM clocks (low
active) for 16-bit lane 3
1
14 - 64 Bit DDR2
SDRAM
DDR01_A00
I/O
Ext PU
SSTL
_18
–
AE5
Shared DDR DRAM
Address Bus for 16-bit lane
0 and 1
1
14 - 64 Bit DDR2
SDRAM
DDR01_A01
I/O
Ext PU
SSTL
_18
–
AF2
Shared DDR DRAM
Address Bus for 16-bit lane
0 and 1
1
14 - 64 Bit DDR2
SDRAM
DDR01_A02
I/O
Ext PU
SSTL
_18
–
AE4
Shared DDR DRAM
Address Bus for 16-bit lane
0 and 1
1
14 - 64 Bit DDR2
SDRAM
DDR01_A03
I/O
Ext PU
SSTL
_18
–
AF3
Shared DDR DRAM
Address Bus for 16-bit lane
0 and 1
1
14 - 64 Bit DDR2
SDRAM
DDR0_A04
I/O
Ext PU
SSTL
_18
–
AJ2
Dedicated DDR DRAM
Address Bus for 16-bit lane
0
1
14 - 64 Bit DDR2
SDRAM
DDR0_A05
I/O
Ext PU
SSTL
_18
–
AJ1
Dedicated DDR DRAM
Address Bus for 16-bit lane
0
1
14 - 64 Bit DDR2
SDRAM
DDR0_A06
I/O
Ext PU
SSTL
_18
–
AJ3
Dedicated DDR DRAM
Address Bus for 16-bit lane
0
1
14 - 64 Bit DDR2
SDRAM
DDR01_A07
I/O
Ext PU
SSTL
_18
–
AG3
Shared DDR DRAM
Address Bus for 16-bit lane
0 and 1
1
14 - 64 Bit DDR2
SDRAM
DDR01_A08
I/O
Ext PU
SSTL
_18
–
AG5
Shared DDR DRAM
Address Bus for 16-bit lane
0 and 1
1
14 - 64 Bit DDR2
SDRAM
DDR01_A09
I/O
Ext PU
SSTL
_18
–
AH2
Shared DDR DRAM
Address Bus for 16-bit lane
0 and 1
Table 1-19: Pin Descriptions (Cont.)
# of
Pins
Orcad Schematic
Block
Label
I/O
Res.
Tol.
(V)
Drv.
(mA)
Loc.
Description