xcr3064a Xilinx Corp., xcr3064a Datasheet - Page 7

• Manufacturer Part Number: xcr3064a
• Description: 64 Macrocell Cpld With Enhanced Clocking , Inc
• Manufacturer: Xilinx Corp.

XCR3064A: 64 Macrocell CPLD With Enhanced Clocking
done. It eliminates the need for a costly, separate program-
ming step in the manufacturing process. Of course, if the
JTAG/ISP function is never required, this feature can be
turned off in the software and the device can be pro-
grammed with an industry-standard programmer, leaving
Table 2: XCR3064A Low-Level JTAG Boundary-Scan Commands
Table 3: JTAG Pin Description
Table 4: XCR3064A JTAG Pinout by Package Type
7
TCK
TMS
TDO
TDI
Pin
Bypass
(1111)
Bypass Register
Idcode
(0001)
Boundary-Scan Register
100-pin VQFP
44-pin PLCC
44-pin VQFP
56-ball CSP
XCR3064A
Device
(Instruction Code)
Register Used
Instruction
Test Clock Output
Test Mode Select
Test Data Output
Test Data Input
Name
F10/C15
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 tri-stated if data is not being shifted out of the device.
32/C15
26/C15
62/C15
TCK
Places the 1 bit bypass register between the TDI and TDO pins, which allows the BST
data to pass synchronously through the selected device to adjacent devices during
normal device operation. The Bypass instruction can be entered by holding TDI at a
constant high value and completing an Instruction-Scan cycle.
Selects the IDCODE register and places it between TDI and TDO, allowing the
IDCODE to be serially shifted out of TDO. The IDCODE instruction permits blind inter-
rogation of the components assembled onto a printed circuit board. Thus, in circum-
stances where the component population may vary, it is possible to determine what
components exist in a product.
www.xilinx.com
1-800-255-7778
(Pin Number/Macrocell #)
G1/B15
13/B15
15/B15
7/B15
TMS
the pins available for I/O functions.
icated pins used by the four mandatory JTAG signals for
each of the XCR3064A package types.
Description
Description
C1/A8
7/A8
4/A8
1/A8
TDI
DS037 (v1.1) February 10, 2000
Table 3
defines the ded-
C10/D8
38/D8
32/D8
73/D8
TDO
R