2/24/2008 9T6WP
BCM7405
Preliminary Hardware Data Module
Hardware Signal Descriptions
06/29/07
Bro a d c o m C o rp o r a ti o n
Page 1-110
Pin Definition Notations
Document
7405-1HDM00-R
1
1 - PCI Bus/EBI
PCI_INT_A1
I
Ext PU
3.3
–
AP31
PCI interrupt[2:1] inputs
1
1 - PCI Bus/EBI
PCI_INT_A2
I
Ext PU
3.3
–
AN31
PCI interrupt[2:1] inputs
1
1 - PCI Bus/EBI
PCI_REQ0b
I
Ext PU
3.3
–
AK29
PCI bus request 0
1
1 - PCI Bus/EBI
PCI_GNT0b
O
–
3.3
–
AL29
PCI bus grant 0
1
1 - PCI Bus/EBI
PCI_REQ1b
I
Ext PU
3.3
–
AM30
PCI bus request 1. ID
Select for the BCM7400 in
client mode
1
1 - PCI Bus/EBI
PCI_GNT1b
I/O
–
3.3
–
AL30
PCI bus grant 1
1
1 - PCI Bus/EBI
PCI_REQ2b
I/O
Ext PU
3.3
–
AP19
PCI bus request 2. Shared
with EBI_CS4b
1
1 - PCI Bus/EBI
PCI_GNT2b
I/O
Ext PU
3.3
–
AK28
PCI bus grant 2. Shared
with EBI_CS5b
POD Support - 1
1
2 - Extended Bus
Interface/Reset In/Out
EBI_TA2b
I
–
3.3
8
AP16
Secondary Transaction
acknowledge (for POD
WAITb)
External Bus Interface – 17+B63 (External Bus Mastering for test)
1
2 - Extended Bus
Interface/Reset In/Out
EBI_NAND_R
Bb
I/OD
Ext PU
3.3
8
AK16
EBI Address bus. Shared
with NAND FLASH R/B
control
1
2 - Extended Bus
Interface/Reset In/Out
EBI_ADDR24
S/O
–
3.3
8
AN19
EBI Address bus.
1
2 - Extended Bus
Interface/Reset In/Out
EBI_ADDR25
S/O
–
3.3
8
AL16
EBI Address bus.
1
2 - Extended Bus
Interface/Reset In/Out
EBI_ADDR26
S/O
–
3.3
8
AK18
EBI Address bus.
1
2 - Extended Bus
Interface/Reset In/Out
EBI_ADDR27
S/O
–
3.3
8
AL18
EBI Address bus.
1
2 - Extended Bus
Interface/Reset In/Out
EBI_CS0b
O
PU
3.3
8
AM16
EBI Chip Selects. Shared
with NAND FLASH CE
1
2 - Extended Bus
Interface/Reset In/Out
EBI_CS1b
O
PU
3.3
8
AM17
EBI Chip Selects. Shared
with NAND FLASH CE (if
CS swap is strapped)
1
2 - Extended Bus
Interface/Reset In/Out
EBI_CS2b
I/O
PU
3.3
8
AM15
EBI Chip Select 2. Shared
with PCI REQ 3
1
2 - Extended Bus
Interface/Reset In/Out
EBI_CS3b
O
PU
3.3
8
AN15
EBI Chip Select 3. Shared
with PCI bus grant 3
1
2 - Extended Bus
Interface/Reset In/Out
EBI_RWb
S/O
–
3.3
8
AN16
EBI Read / Write
1
2 - Extended Bus
Interface/Reset In/Out
EBI_WE0b
S/O
–
3.3
8
AP17
Write control for 8 or 16-bit
devices. Shared with NAND
FLASH WE
1
2 - Extended Bus
Interface/Reset In/Out
EBI_WE1b
S/O
–
3.3
8
AK15
Write control for 8 or 16-bit
devices
Table 1-19: Pin Descriptions (Cont.)
# of
Pins
Orcad Schematic
Block
Label
I/O
Res.
Tol.
(V)
Drv.
(mA)
Loc.
Description