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EP1AGX35C Datasheet(PDF) 27 Page - Altera Corporation

Part No. EP1AGX35C
Description  1. Enhanced Configuration Devices (EPC4, EPC8, and EPC16) Data Sheet
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Manufacturer  ALTERA [Altera Corporation]
Direct Link  http://www.altera.com
Logo ALTERA - Altera Corporation

EP1AGX35C Datasheet(HTML) 27 Page - Altera Corporation

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Chapter 1: Enhanced Configuration Devices (EPC4, EPC8, and EPC16) Data Sheet
1–27
Programming and Configuration File Support
© December 2009
Altera Corporation
Configuration Handbook (Complete Two-Volume Set)
f For more information about the enhanced configuration device JTAG support, refer to
the BSDL files provided at the Altera website.
Enhanced configuration devices can also be programmed by third-party flash
programmers or on-board processors using the external flash interface. Programming
files (.pof) can be converted to an Intel HEX format file (.hexout) using the Quartus II
Convert Programming Files
utility, for use with the programmers or processors.
You can also program the enhanced configuration devices using the Quartus II
software, the Altera Programming Unit (APU), and the appropriate configuration
device programming adapter. Table 1–12 lists which programming adapter to use
with each enhanced configuration device.
INIT_CONF
00 0110 0001
This function initiates the FPGA re-configuration process by pulsing the
nINIT_CONF
pin low, which is connected to the FPGA nCONFIG pin. After
this instruction is updated, the nINIT_CONF pin is pulsed low when the JTAG
state machine enters Run-Test/Idle state. The nINIT_CONF pin is then
released and nCONFIG is pulled high by the resistor after the JTAG state
machine goes out of Run-Test/Idle state. The FPGA configuration starts after
nCONFIG
goes high. As a result, the FPGA is configured with the new
configuration data stored in flash via ISP. This function can be added to your
programming file (
.pof, .jam, .jbc) in the Quartus II software by enabling the
Initiate configuration after programming option in the Programmer options
window (Options menu).
PENDCFG
00 0110 0101
This optional function can be used to hold the nINIT_CONF pin low during
JTAG-based ISP of the enhanced configuration device. This feature is useful
when the external flash interface is controlled by an external FPGA/processor.
This function prevents contention on the flash pins when both the controller and
external device try to access the flash simultaneously. Before the enhanced
configuration device’s controller can access the flash memory, the external
FPGA/processor needs to tri-state its interface to flash.This can be ensured by
resetting the FPGA using the nINIT_CONF, which drives the nCONFIG pin and
keeps the external FPGA/processor in the “reset” state. The nINIT_CONF pin is
released when the initiate configuration (INIT_CONF) JTAG instruction is
issued.
Note to Table 1–11:
(1) Enhanced configuration device instruction register length is 10 and boundary scan length is 174.
Table 1–11. Enhanced Configuration Device JTAG Instructions (Part 2 of 2) (Note 1)
JTAG Instruction
OPCODE
Description
Table 1–12. Programming Adapters
Device
Package
Adapter
EPC16
88-pin UFBGA
PLMUEPC-88
100-pin PQFP
PLMQEPC-100
EPC8
100-pin PQFP
PLMQEPC-100
EPC4
100-pin PQFP
PLMQEPC-100


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