EP4CE30F29C7N Datasheet, PDF (203/488 Pages) Altera Corporation – Cyclone IV Device Handbook, Volume 1

Chapter 8: Configuration and Remote System Upgrades in Cyclone IV Devices
Configuration
8–39
You can use a download cable to configure multiple Cyclone IV device configuration
pins. nCONFIG, nSTATUS, DCLK, DATA[0], and CONF_DONE are connected to every device in
the chain. All devices in the chain utilize and enter user mode at the same time
because all CONF_DONE pins are tied together.
In addition, the entire chain halts configuration if any device detects an error because
the nSTATUS pins are tied together. Figure 8–18 shows the PS configuration for
multiple Cyclone IV devices using a MasterBlaster, USB-Blaster, ByteBlaster II, or
ByteBlasterMV cable.
Figure 8–18. Multi-Device PS Configuration Using a Download Cable
V_CCA (1)
10 kΩ
(2)
V_CCIO (4)
10 kΩ
V_CCA (1)
10 kΩ
GND
V_CCA (1)
10 kΩ
V_CCA (1) (2)
10 kΩ
V_CCA (1)
Cyclone IV Device 1
10 kΩ
CONF_DONE
nSTATUS
DCLK
MSEL[ ] (6)
nCE
DATA[0]
nCONFIG
nCEO
Download Cable
10-Pin Male Header
(Passive Serial Mode)
Pin 1
V_CCA (7)
GND
VIO (3)
GND
Cyclone IV Device 2
CONF_DONE
nSTATUS
MSEL[ ]
(6)
DCLK
nCEO N.C. (5)
nCE
DATA[0]
nCONFIG
Notes to Figure 8–18:
(1) You must connect the pull-up resistor to the same supply voltage as the V_CCA supply.
(2) The pull-up resistors on DATA[0] and DCLK are only required if the download cable is the only configuration scheme
used on your board. This ensures that DATA[0] and DCLK are not left floating after configuration. For example, if you
also use a configuration device, the pull-up resistors on DATA[0] and DCLK are not required.
(3) Pin 6 of the header is a V_IO reference voltage for the MasterBlaster output driver. V_IO must match the V_CCA of the
device. For this value, refer to the MasterBlaster Serial/USB Communications Cable User Guide. When using the
ByteBlasterMV download cable, this pin is a no connect. When using USB-Blaster, ByteBlaster II, and EthernetBlaster
cables, this pin is connected to nCE when it is used for AS programming. Otherwise, it is a no connect.
(4) Connect the pull-up resistor to the V_CCIO supply voltage of the I/O bank in which the nCE pin resides.
(5) The nCEO pin of the last device in the chain is left unconnected or used as a user I/O pin.
(6) The MSEL pin settings vary for different configuration voltage standards and POR time. To connect MSEL for PS
configuration schemes, refer to Table 8–3 on page 8–8, Table 8–4 on page 8–8, and Table 8–5 on page 8–9. Connect
the MSEL pins directly to V_CCA or GND.
(7) Power up the V_CC of the ByteBlaster II, USB-Blaster, or ByteBlasterMV cable with a 2.5 V supply from V_CCA. Third-party
programmers must switch to 2.5 V. Pin 4 of the header is a V_CC 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.
May 2013 Altera Corporation
Cyclone IV Device Handbook,
Volume 1