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| 型號(hào)： | OR2T04A-3S84 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | FPGA |
| 英文描述： | Field-Programmable Gate Arrays |
| 中文描述： | 現(xiàn)場(chǎng)可編程門陣列 |
| 文件頁數(shù)： | 66/192頁 |
| 文件大?。?/td> | 3148K |
| 代理商： | OR2T04A-3S84 |
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Data Sheet
June 1999
ORCA Series 2 FPGAs
66
Lucent Technologies Inc.
Pin Information
Pin Descriptions
This section describes the pins found on the Series 2 FPGAs. Any pin not described in this table is a user-program-
mable I/O. During configuration, the user-programmable I/Os are 3-stated with an internal pull-up resistor enabled.
Table 17. Pin Descriptions
Symbol
I/O
Description
Dedicated Pins
V
DD
GND
I/O-V
DD
5
—
—
—
Positive power supply.
Ground supply.
5 V tolerant select. (For 2TxxA only.) All V
DD
5 pins must be tied to either the 5 V power
supply if 5 V tolerant I/O buffers are to be used, or to the 3.3 V power supply (V
DD
) if
they are not. For 2CxxA and 2TxxB devices, these pins are user-programmable I/Os.
During configuration, RESET forces the restart of configuration and a pull-up is
enabled. After configuration, RESET can be used as a general FPGA input or as a
direct input, which causes all PLC latches/FFs to be asynchronously set/reset.
In the master and asynchronous peripheral modes, CCLK is an output which strobes
configuration data in. In the slave or synchronous peripheral mode, CCLK is input syn-
chronous with the data on DIN or D[7:0].
DONE is a bidirectional pin with an optional pull-up resistor. As an active-high, open-
drain output, a high-level on this signal indicates that configuration is complete. As an
input, a low level on DONE delays FPGA start-up after configuration*.
PRGM is an active-low input that forces the restart of configuration and resets the
boundary-scan circuitry. This pin always has an active pull-up.
This pin must be held high during device initialization until the
INIT
pin goes high.
RESET
I
CCLK
I
DONE
I/O
PRGM
I
RD_CFG
I
This pin always has an active pullup.
During configuration,
RD_CFG
is an active-low input that activates the TS_ALL function
and 3-states all of the I/O.
After configuration,
RD_CFG
can be selected (via a bit stream option) to activate the
TS_ALL function as described above, or, if readback is enabled via a bit stream option,
a high-to-low transition on
RD_CFG
will initiate readback of the configuration data,
including PFU output states, starting with frame address 0.
RD_DATA/TDO is a dual-function pin. If used for readback, RD_DATA provides configu-
ration data out. If used in boundary scan, TDO is test data out.
Special-Purpose Pins (Become User I/O After Configuration)
RDY/RCLK
O
During configuration in peripheral mode, RDY indicates another byte can be written to
the FPGA. If a read operation is done when the device is selected, the same status is
also available on D7 in asynchronous peripheral mode. After configuration, the pin is a
user-programmable I/O*.
During the master parallel configuration mode RCLK, which is a read output signal to an
external memory. This output is not normally used. After configuration, this pin is a user-
programmable I/O pin*.
DIN
I
During slave serial or master serial configuration modes, DIN accepts serial configura-
tion data synchronous with CCLK. During parallel configuration modes, DIN is the D0
input. During configuration, a pull-up is enabled, and after configuration, this pin is a
user-programmable I/O pin*.
RD_DATA/TDO
O
* The FPGA States of Operation section contains more information on how to control these signals during start-up. The timing of DONE
release is controlled by one set of bit stream options, and the timing of the simultaneous release of all other configuration pns (and the acti-
vation of all user I/Os) is controlled by a second set of options.
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