EP4CE30F29C7N Datasheet, PDF (193/488 Pages) Altera Corporation – Cyclone IV Device Handbook, Volume 1

Chapter 8: Configuration and Remote System Upgrades in Cyclone IV Devices
Configuration
8–29
Figure 8–10 shows the AP configuration with multiple bus masters.
Figure 8–10. AP Configuration with Multiple Bus Masters
Other Master Device (6)
V (1)
CCIO
V (1)
CCIO
V (1)
CCIO
10 k
10 k
10 k
CLK
RST#
CE#
OE#
ADV#
WE#
WAIT
DQ[15:0]
A[24:1]
Micron P30/P33 Flash
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]
Cyclone IV E
Master Device
Notes to Figure 8–10:
(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 8–5 on page 8–9.
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 IV E 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 8–5.
(6) The other master device must fit the maximum overshoot equation outlined in “Configuration and JTAG Pin I/O Requirements” on page 8–5.
(7) The other master device can control the AP configuration bus by driving the nCE 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 and not tied to V_CCIO.
May 2013 Altera Corporation
Cyclone IV Device Handbook,
Volume 1