APEX20K datasheet(114/117 Pages) ALTERA

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Altera Corporation

APEX 20K Programmable Logic Device Family Data Sheet

SRAM configuration elements allow APEX 20K devices to be

reconfigured in-circuit by loading new configuration data into the

device. Real-time reconfiguration is performed by forcing the device

into command mode with a device pin, loading different

configuration data, reinitializing the device, and resuming user-

mode operation. In-field upgrades can be performed by distributing

new configuration files.

Configuration Schemes

The configuration data for an APEX 20K device can be loaded with

one of five configuration schemes (see Table 111), chosen on the basis

of the target application. An EPC2 or EPC16 configuration device,

intelligent controller, or the JTAG port can be used to control the

configuration of an APEX 20K device. When a configuration device

is used, the system can configure automatically at system power-up.

Multiple APEX 20K devices can be configured in any of five

configuration schemes by connecting the configuration enable (nCE)

and configuration enable output (nCEO) pins on each device.

f For more information on configuration, see Application Note 116

(Configuring APEX 20K, FLEX 10K, & FLEX 6000 Devices.)

Device Pin-Outs

See the Altera web site (http://www.altera.com) or the Altera Digital

Library

for pin-out information

Table 111. Data Sources for Configuration

Configuration Scheme

Data Source

Configuration device

EPC1, EPC2, EPC16 configuration devices

Passive serial (PS)

MasterBlaster or ByteBlasterMV download cable or serial data source

Passive parallel asynchronous (PPA)

Parallel data source

Passive parallel synchronous (PPS)

Parallel data source

JTAG

MasterBlaster or ByteBlasterMV download cable or a microprocessor

with a Jam or JBC File

APEX20K Datasheet(PDF) 114 Page - Altera Corporation