Chapter 9: Configuration, Design Security, and Remote System Upgrades in the Cyclone III Device Family
9–31
Configuration Features
Figure 9–11 shows the AP configuration with multiple bus masters.
Figure 9–11. AP Configuration with Multiple Bus Masters
(6)
Other Master Device
V
CCIO
(1)
V
CCIO
(1) V
CCIO
(1)
#V
IAT
10 k
K
T
#
#
D
#
W
:
:
O
nOCNFIG
10 k
10 k
UTS
A
SnT
CnONFGI
nCE
FC_DOEN
10 k
nCEO
(2)
GND
CLK
RST#
CE#
DCLK (5)
nRESET
FLASH_nCE
nOE
nAVD
OE#
ADV#
WE#
WAIT
MSEL[3..0]
(3)
nWE
I/O (4)
DATA[15..0] (5)
PADD[23..0]
DQ[15:0]
A[24:1]
Micron P30/P33 Flash
Cyclone III Master Device
Notes to Figure 9–11:
(1) Connect the pull-up resistors to the VCCIO supply of the bank in which the pin resides.
(2) The nCEOpin is left unconnected or used as a user I/O pin when it does not feed the nCEpin of another device.
(3) The MSEL pin settings vary for different configuration voltage standards and POR time. To connect MSEL[3..0], refer to Table 9–7 on page 9–11.
Connect the MSEL pins directly to VCCA or GND.
(4) The AP configuration ignores the WAITsignal during configuration mode. However, if you are accessing flash during user mode with user logic,
you can optionally use the normal I/O to monitor the WAITsignal from the Micron P30 or P33 flash.
(5) When cascading Cyclone III devices in a multi-device AP configuration, connect the repeater buffers between the master device and slave devices
for DATA[15..0]and DCLK. All I/O inputs must maintain a maximum AC voltage of 4.1 V. The output resistance of the repeater buffers must fit
the maximum overshoot equation outlined in “Configuration and JTAG Pin I/O Requirements” on page 9–7.
(6) The other master device must fit the maximum overshoot equation outlined in “Configuration and JTAG Pin I/O Requirements” on page 9–7.
(7) The other master device can control the AP configuration bus by driving the nCE pin to high with an output high on the I/O pin.
(8) The other master device can pulse nCONFIGif it is under system control rather than tied to VCCIO
.
August 2012 Altera Corporation
Cyclone III Device Handbook
Volume 1
ALTERA [ ALTERA CORPORATION ]
