Chapter 9: Configuration, Design Security, and Remote System Upgrades in the Cyclone III Device Family
9–29
Configuration Features
Word-Wide Multi-Device AP Configuration
The more efficient setup is one in which some of the slave devices are connected to the
LSB of DATA[7..0]and the remaining slave devices are connected to the MSB of
DATA[15..8]. In the word-wide multi-device AP configuration, the nCEOpin of the
master device enables two separate daisy-chains of slave devices, allowing both
chains to be programmed concurrently, as shown in Figure 9–10.
Figure 9–10. Word-Wide Multi-Device AP Configuration
V
(1)
CCIO
(1)
V
(1)
CCIO
V
CCIO
V
CCIO
(2)
V
CCIO
(2)
10 kΩ
10 kΩ
10 kΩ
10 kΩ
10 kΩ
S
S
TUS
A
A
A
T
T
nST
F
F
nOCNFIG
O
O
C_FDONE
nCE
nCEO
nCE
nCEO
nCE
nCEO N.C. (3)
GND
CLK
RST#
CE#
DCLK
nRESET
FLASH_nCE
nOE
OE#
ADV#
WE#
WAIT
nAVD
nWE
MSEL[3..0]
MSEL[3..0]
MSEL[3..0]
(4)
(4)
DQ[7..0]
(4)
DQ[7..0]
I/O (5)
DATA[15..0]
PADD[23..0]
DATA[7..0]
DCLK
DATA[7..0]
DCLK
DQ[15:0]
A[24:1]
Micron P30/P33 Flash
Cyclone III Master Device
Cyclone III Slave Device
Cyclone III Slave Device
V
CCIO
(1)
Buffers (6)
10 kΩ
S
TUS
A
A
T
nST
F
nOCNFIG
O
C_FDONE
nCE
nCEO
nCE
nCEO
N.C. (3)
DQ[15..8]
MSEL[3..0]
MSEL[3..0]
(4)
(4)
DATA[7..0]
DCLK
DATA[7..0]
DCLK
DQ[15..8]
Cyclone III Slave Device
Cyclone III Slave Device
Notes to Figure 9–10:
(1) Connect the pull-up resistors to the VCCIO supply of the bank in which the pin resides.
(2) Connect the pull-up resistor to the VCCIO supply voltage of the I/O bank in which the nCEpin resides.
(3) The nCEOpin is left unconnected or used as a user I/O pin when it does not feed the nCEpin of another device.
(4) The MSEL pin settings vary for different configuration voltage standards and POR time. You must set the master device in AP mode and the slave
devices in FPP mode. To connect MSEL[3..0]for the master device in AP mode and the slave devices in FPP mode, refer to Table 9–7 on
page 9–11. Connect the MSEL pins directly to VCCA or GND.
(5) 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 pin to monitor the WAITsignal from the Micron P30 or P33 flash.
(6) Connect the repeater buffers between the Cyclone III 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.
1
In a multi-device AP configuration, the board trace length between the parallel flash
and the master device must follow the recommendations listed in Table 9–12.
August 2012 Altera Corporation
Cyclone III Device Handbook
Volume 1
ALTERA [ ALTERA CORPORATION ]
