Using the ATEVK525
2-10
ATEVK525 Mass Storage Board for AVR
7740B–AVR–03/08
NF Module Installation
Figure 2-5 .
NAND Flash module on the ATEVK525, plus MMC card
When using the NAND Flash module, the following pin assignments do not change :
Data/Address bus, CLE, ALE, RE#, WE#, WP# (Write Protect feature drives all the
chips at the same time). Other signal assignments are grouped in the following table.
Table 2-4 .
NAND Flash module pin assignment
Note:
1. When using the additional module, the resistor R10 must be unsoldered, else
the CE# lines of the NAND Flash soldered and the NAND Flash #0 of the mod-
ule will be connected together (not applicable if NF #0 is not mounted on the
module)
2. When using the additional module, check that the configuration pads that enable
CTS/RTS lines on STK525 are not soldered, because these signals are also con-
nected to the R/B#2 & 3. But if CTS/RTS lines are required, you cannot use the
R/B#2 & 3 signals, so disable the configuration pads CP1 & CP2 of the ATEVK525.
NAND Flash
Microcontroller
Function
CE0#
PORTC2 (A10)
Chip select for chip 0 (active low, on-board pull-up)
CE1#
PORTC3 (A11)
Chip select for chip 1 (active low, on-board pull-up)
CE2#
PORTC4 (A12)
Chip select for chip 2 (active low, on-board pull-up)
CE3#
PORTC5 (A13)
Chip select for chip 3 (active low, on-board pull-up)
R/B0#
PORTC6
Ready / Busy# for chip 0 (pull-up to enable in micro)
R/B1#
PORTC7
Ready / Busy# for chip 1 (pull-up to enable in micro)
R/B2#
PORTD0
Ready / Busy# for chip 2 (pull-up to enable in micro)
R/B3#
PORTD1
Ready / Busy# for chip 3 (pull-up to enable in micro)
See Note 1
