ispgdx80va Lattice Semiconductor Corp., ispgdx80va Datasheet - Page 18

• Manufacturer Part Number: ispgdx80va
• Description: In-system Programmable 3.3v Generic Digital Crosspoint
• Manufacturer: Lattice Semiconductor Corp.

The ispGDXVA devices provide IEEE1149.1a test capa-
bility and ISP programming through a standard Boundary
Scan Test Access Port (TAP) interface.
The boundary scan circuitry on the ispGDXVA Family
operates independently of the programmed pattern. This
Figure 10. Boundary Scan Register Circuit for I/O Pins
Table 3. I/O Shift Register Order
Table 4. ispGDX80VA Device ID Codes
Boundary Scan
ispGDX80VA
ispGDX80VA
DEVICE
DEVICE
(from previous
Shift DR
SCANIN
cell
TDI, TOE, RESET, Y1, Y0, I/O B10 .. B19, I/O C0 .. C19, I/O D0 .. D9, I/O B9 .. B0, I/O A19.. A0,
I/O D19 .. D10, TDO
0001, 0000, 0011, 0101, 0000, 0000, 0100, 0011
32-BIT BOUNDARY SCAN ID CODE
Clock DR
Registers
BSCAN
D
D
D
Q
Q
Q
Update DR
BSCAN
Latches
D
D
I/O SHIFT REGISTER ORDER
ID Code/GDX80VA
Q
Q
18
Reset
allows customers using boundary scan test to have full
test capability with only a single BSDL file.
The ispGDXVA devices are identified by the 32-bit JTAG
IDCODE register. The device ID assignments are listed
in Table 4.
PROG_MODE
EXTEST
EXTEST
TOE
Specifications ispGDX80VA
Function
Function
Normal
Normal
HIGHZ
OE
SCANOUT
(to next cell)
0
1
0
1
I/O Shift Reg Order/ispGDXVA
I/O Pin