8–24
Chapter 8: Configuration and Remote System Upgrades in Cyclone IV Devices
Configuration
May 2013
Altera Corporation
shows the interface for the Micron P30 flash memory and P33 flash
memory to the Cyclone IV E device pins.
1
To tri-state the configuration bus for AP configuration schemes, you must tie
nCE
high
and
nCONFIG
low.
1
In a single-device AP configuration, the maximum board loading and board trace
length between supported parallel flash and Cyclone IV E devices must follow the
recommendations listed in
.
1
If you use the AP configuration scheme for Cyclone IV E devices, the V
CCIO
of I/O
banks 1, 6, 7, and 8 must be 3.3, 3.0, 2.5, or 1.8 V. Altera does not recommend using the
level shifter between the Micron P30 or P33 flash and the Cyclone IV E device in the
AP configuration scheme.
Figure 8–7. Single-Device AP Configuration Using Micron P30 and P33 Flash Memory
Notes to
(1) Connect the pull-up resistors to the V
CCIO
supply of the bank in which the pin resides.
(2) The
nCEO
pin is left unconnected or used as a user I/O pin when it does not feed the
nCE
pin of another device.
(3) The
MSEL
pin settings vary for different configuration voltage standards and POR time. To connect
MSEL[3..0]
Connect the
MSEL
pins directly to V
CCA
or GND.
(4) AP configuration ignores the
WAIT
signal during configuration mode. However, if you are accessing flash during user mode with user logic, you
can optionally use normal I/O to monitor the
WAIT
signal from the Micron P30 or P33 flash.
CLK
RST#
CE#
OE#
ADV#
W
E#
W
AIT
DQ[15:0]
A[24:1]
DCLK
nRESET
FLASH_nCE
nOE
nAVD
n
W
E
I/O
(4)
DATA[15..0]
PADD[23..0]
nCE
VCCIO (1) VCCIO (1)
10k
10k
nCONFIG
nST
A
TUS
CONF_DONE
MSEL[3..0]
(3)
nCEO
N.C.
(2)
Cyclone IV E Device
Micron P30/P33 Flash
GND
VCCIO (1)
10k
Содержание Cyclone IV
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