CDPCLK4 datasheet(215/274 Pages) ALTERA

215 / 274 page

Chapter 9: Configuration, Design Security, and Remote System Upgrades in the Cyclone III Device Family

9–57

Configuration Features

August 2012

Altera Corporation

Cyclone III Device Handbook

Volume 1

Figure 9–29. Combining JTAG and AS Configuration Schemes

Notes to Figure 9–29:

(1) Connect these pull-up resistors to the VCCIO supply of the bank in which the pin resides.

(2) Power up the VCC of the ByteBlaster II, USB-Blaster, or Ethernet Blaster cable with the 3.3-V supply.

(3) Pin 6 of the header is a VIO reference voltage for the MasterBlaster output driver. VIO must match the VCCA of the

device. For this value, refer to the MasterBlaster Serial/USB Communications Cable User Guide. In ByteBlasterMV,

this pin is a no connect. In USB-Blaster and ByteBlaster II, this pin is connected to nCE when it is used for AS

programming, otherwise it is a no connect.

(4) The MSEL pin settings vary for different configuration voltage standards and POR time. To connect MSEL[3..0]for

AS configuration schemes, refer to Table 9–7 on page 9–11. Connect the MSEL pins directly to VCCA or GND.

(5) These are dual-purpose I/O pins. This nCSO pin functions as the FLASH_NCE pin in AP mode. The ASDO pin functions

as the DATA[1] pin in other AP and FPP modes.

(6) Power up VCC of the ByteBlaster II, USB-Blaster, ByteBlasterMV, or Ethernet Blaster cable with a 2.5- V supply from

VCCA. Third-party programmers must switch to 2.5 V. Pin 4 of the header is a VCC power supply for the MasterBlaster

cable. The MasterBlaster cable can receive power from either 5.0- or 3.3-V circuit boards, DC power supply, or 5.0 V

from the USB cable. For this value, refer to the MasterBlaster Serial/USB Communications Cable User Guide.

(7) You must place the diodes and capacitors as close as possible to the Cyclone III device family. For effective voltage

clamping, Altera recommends using the Schottky diode, which has a relatively lower forward diode voltage (VF) than

the switching and Zener diodes. For more information about the interface guidelines using Schottky diodes, refer to

AN 523: Cyclone III Configuration Interface Guidelines with EPCS Devices.

(8) The resistor value can vary from 1 k

 to 10 k. Perform signal integrity analysis to select the resistor value for your

setup.

DATA

DCLK

nCS

ASDI

Serial

Configuration

Device

Cyclone III Device Family

10 k

VCCIO

GND

nCEO

nCE

nSTATUS

CONF_DONE

10 k

VCCIO

nCONFIG

MSEL [3..0]

(1)

(4)

10k

VCCA

N.C.

VCCA

TCK

TDO

TMS

TDI

GND

1 k

VCCA (6)

VIO (3)

3.3 V (2)

Pin 1

Download Cable

(JTAG Mode)

10-Pin Male Header

(top view)

Download Cable

(AS Mode)

10-Pin Male Header

3.3 V

10 pf

GND

10 pf

GND

10 pf

GND

(7)

(8)

3.3 V

DATA[0]

DCLK

nCSO (5)

ASDO (5)

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