EP3C120F484C7 Datasheet, PDF (189/274 Pages) Altera Corporation – Cyclone III Device Handbook

Chapter 9: Configuration, Design Security, and Remote System Upgrades in the Cyclone III Device Family
Configuration Features
9–31
Figure 9–11 shows the AP configuration with multiple bus masters.
Figure 9–11. AP Configuration with Multiple Bus Masters
Other Master Device (6)
VCCIO (1)
VCCIO (1) VCCIO (1)
10 k
10 k
10 k
CLK
RST#
CE#
OE#
ADV#
WE#
WAIT
DQ[15:0]
A[24:1]
nCE
10 k
nCEO
(2)
GND
DCLK (5)
nRESET
FLASH_nCE
nOE
nAVD
nWE
MSEL[3..0]
(3)
I/O (4)
DATA[15..0] (5)
PADD[23..0]
Micron P30/P33 Flash
Cyclone III Master Device
Notes to Figure 9–11:
(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], refer to Table 9–7 on page 9–11.
Connect the MSEL pins directly to V_CCA or GND.
(4) The 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 the normal I/O to monitor the WAIT signal 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 nCONFIG if it is under system control rather than tied to V_CCIO.
August 2012 Altera Corporation
Cyclone III Device Handbook
Volume 1