MV78100
Hardware Specifications
2.2.4
Device Bus Interface Pin Assignments
If using a 16-bit Device Bus, DEV_AD[23:16] and DEV_WEn[3:2] can be used for pins
multiplexing (as MPP pins). If using an 8-bit Device Bus also DEV_AD[15:9] and
DEV_WEn[1] can be used for pins multiplexing (see Section 6, Pin Multiplexing,
Note
on page 44 for more details).
NAND Flash interface signals are multiplexed on the Device Bus interface and on MPP
pins. Refer to the NAND Flash section in the MV76100, MV78100, and MV78200
Functional Specifications for more information.
Table 6: Device Bus Interface Pin Assignments
Pin Name
I/O
Pin Type
Power
Rail
Description
DEV_CSn[3:0]
DEV_BootCSn
O
CMOS
VDDO_C
VDDO_C
VDDO_C
Device Bus Chip Select corresponds to Bank [3:0].
NOTE: These pins have internal pullup resistors.
O
CMOS
Device Bus Boot Chip Select corresponds to Boot Bank.
NOTE: This pin has an integrated pullup resistor.
DEV_OEn/
DEV_A[15]
O
CMOS
Device Bus Output Enable
NOTE: This pin has an integrated pullup resistor.
Used as DEV_A[15] (device address bus) during first ALE cycle
(DEV_ALE[1]).
DEV_WEn[3:0]/
DEV_A[16]
O
O
CMOS
VDDO_C
Device Bus Byte Write Enable (bit per byte)
NOTE: These pins have integrated pullup/pulldown resistors.
See details in Table 22, Reset Configuration, on page 52.
DEV_WEn[0] is used as DEV_A[16] (device address bus) during
first ALE cycle (DEV_ALE[1]).
DEV_ALE[1:0]
CMOS
CMOS
VDDO_C
VDDO_C
Device Bus Address Latch Enable
NOTE: These pins have integrated pullup/pulldown resistors.
See details in Table 22, Reset Configuration, on page 52.
DEV_AD[7:0]/
DEV_A[13:6]/
DEV_A[26:19]
t/s
I/O
Used as DEV_AD[7:0] (device data bus) during the data phase.
Driven by MV78100 on write access, and by the device on read
access.
NOTE: These pins have integrated pullup/pulldown resistors.
See details in Table 22, Reset Configuration, on page 52.
Used as DEV_A[13:6] (device address bus) during first ALE cycle
(DEV_ALE[1]).
Used as DEV_A[26:19] (device address bus) during second ALE
cycle (DEV_ALE[0]).
MV-S104552-U0 Rev. D
Page 26
Copyright © 2008 Marvell
Document Classification: Proprietary Information
December 6, 2008, Preliminary
MARVELL [ MARVELL TECHNOLOGY GROUP LTD. ]
