EP4CE40 datasheet(190/488 Pages) ALTERA

190 / 488 page

8–26

Chapter 8: Configuration and Remote System Upgrades in Cyclone IV Devices

Configuration

Cyclone IV Device Handbook,

May 2013

Altera Corporation

Volume 1

Byte-Wide Multi-Device AP Configuration

The simpler method for multi-device AP configuration is the byte-wide multi-device

AP configuration. In the byte-wide multi-device AP configuration, the LSB of the

DATA[7..0]

pin from the flash and master device (set to the AP configuration scheme)

is connected to the slave devices set to the FPP configuration scheme, as shown in

Figure 8–8.

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 the DATA[7..0]and the remaining slave devices are connected to the MSB of

the DATA[15..8]. In the word-wide multi-device AP configuration, the nCEO pin of the

master device enables two separate daisy chains of slave devices, allowing both

chains to be programmed concurrently, as shown in Figure 8–9.

Figure 8–8. Byte-Wide Multi-Device AP Configuration

Notes to Figure 8–8:

(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 nCE pin resides.

(3) 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.

(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 8–5 on

page 8–9. Connect the MSEL pins directly to VCCA or GND.

(5) 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.

(6) Connect the repeater buffers between the Cyclone IV E 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.

CLK

RST#

CE#

OE#

ADV#

WE#

WAIT

DQ[15:0]

A[24:1]

DCLK

nRESET

FLASH_nCE

nOE

nAVD

nWE

I/O (5)

DATA[15..0]

PADD[23..0]

nCE

VCCIO (1)

MSEL[3..0]

(4)

nCEO

N.C.

(3)

Cyclone IV E

Master Device

Micron P30/P33 Flash

GND

DATA[7..0]

DCLK

nCE

MSEL[3..0]

(4)

nCEO

Cyclone IV E Slave Device

DATA[7..0]

DCLK

nCE

MSEL[3..0]

(4)

nCEO

Cyclone IV E Slave Device

VCCIO (2)

Buffers (6)

DQ[7..0]

10 k

VCCIO (1)

10 k

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