XCR3128A-10TQ128C XILINX [Xilinx, Inc], XCR3128A-10TQ128C Datasheet - Page 8

• Manufacturer Part Number: XCR3128A-10TQ128C
• Description: CPLD with Enhanced Clocking
• Manufacturer: XILINX [Xilinx, Inc]

Table 3: JTAG Pin Description
Table 4: XCR3128A JTAG Pinout by Package Type
3.3V, In-System Programming (ISP)
ISP is the ability to reconfigure the logic and functionality of
a device, printed circuit board, or complete electronic sys-
tem before, during, and after its manufacture and shipment
to the end customer. ISP provides substantial benefits in
each of the following areas:
• Design
• Manufacturing
DS035 (v1.2) August 10, 2000
- Faster time-to-market
- Debug partitioning and simplified prototyping
- Printed circuit board reconfiguration during debug
- Better device and board level testing
- Multi-functional hardware
- Reconfigurability for test
- Eliminates handling of "fine lead-pitch" components
- Reduced inventory and manufacturing costs
TMS
TDO
TCK
TDI
Pin
100-pin VQFP
128-pin TQFP
for programming
XCR3128A
Device
R
Test Clock Output
Test Mode Select
Test Data Output
Test Data Input
Name
62/F15
82/F15
TCK
Clock pin to shift the serial data and instructions in and out of the TDI and TDO pins,
respectively.
Serial input pin selects the JTAG instruction mode. TMS should be driven High
during user mode operation.
Serial input pin for instructions and test data. Data is shifted in on the rising edge of
TCK.
Serial output pin for instructions and test data. Data is shifted out on the falling edge
of TCK. The signal is 3-stated if data is not being shifted out of the device.
XCR3128A: 128 Macrocell CPLD with Enhanced Clocking
www.xilinx.com
1-800-255-7778
(Pin Number / Macrocell #)
15/C15
21/C15
TMS
• Field Support
The Xilinx XCR3128A allows for 3.3V in-system program-
ming/reprogramming of its EEPROM cells via its JTAG
interface. An on-chip charge pump eliminates the need for
externally provided supervoltages, so that the XCR3128A
may be easily programmed on the circuit board using only
the 3V supply required by the device for normal operation.
A set of low-level ISP basic commands implemented in the
XCR3128A enable this feature. The ISP commands imple-
mented in the Xilinx XCR3128A are specified in
Please note that an ENABLE command must precede all
ISP commands unless an ENABLE command has already
been given for a preceding ISP command.
-
-
-
Improved quality and reliability
Easy remote upgrades and repair
Support for field configuration, reconfiguration, and
customization
Description
4/B15
8/B15
TDI
73/G15
95/G15
TDO
Table
5.
8