Specifications ispGDX Family
For In-System Programming, Lattice’s ispGDX devices
may be programmed, alone or in a chain with up to 100
other Lattice ISP devices, using Lattice’s ISP Daisy
Chain Download software. This powerful Windows-
based tool can be launched from the Tool Bar or by
Invoking the Download option from the drop down menu
within the ispGDX Design System. ISP Daisy Chain
Download version 5.0 or above supports the ispGDX
Family devices.
Download
.jed - JEDEC Device Programming File
Third-Party Timing Simulation
The ispGDX Design System will generate simulation
netlists as specified by a user. The simulation netlist
formats available are: EDIF, Verilog (OVI compliant),
VHDL (VITAL compliant), Viewlogic, and OrCAD.
In-System Programmability
AllnecessaryprogrammingoftheispGDXFamilyisdone Select (TMS) control. The corresponding Lattice ISP
via five TTL level logic interface signals. These five control signals are SDI, SDO, SCLK and MODE. These
signals are fed into the on-chip programming circuitry signals switch their operation from IEEE 1149.1 bound-
where a state machine controls the programming.
ary scan protocol to Lattice ISP programming protocol
based on the state of the BSCAN/ispEN pin as shown in
Table 2. Figure 5 illustrates the block diagram for the ISP
programming interface. Figure 6 illustrates the block
diagram for the ispJTAG interface.
On-chip programming can be accomplished using either
an IEEE 1149.1 boundary scan protocol or a Lattice
industry-standard ISP programming protocol. The IEEE
1149.1-compliantinterfacesignalsareTestDataIn(TDI),
Test Data Out (TDO), Test Clock (TCK) and Test Mode
Table 2. Operating Mode Control Signals
BSCAN/ispEN
OPERATION
CONTROL PIN FUNCTION
0
1
Program Device Using Lattice ISP Protocol
SDI, SDO, SCLK, MODE
Program Device or Normal Operation Using IEEE 1149.1 Protocol
TDI, TDO, TCK, TMS
Op Mode Signals/ispGDX
Figure 5. ISP Device Programming Interface
Figure 6. ispJTAG Device Programming Interface
TDO
TDI
SDO
ispJTAG
Programming
Interface
SDI
MODE
SCLK
ispEN
5-wire
Programming
Interface
TMS
TCK
VCC
BSCAN/ispEN
BSCAN/ispEN
BSCAN/ispEN
BSCAN/ispEN
BSCAN/ispEN
BSCAN/ispEN
ispGDX
80A
ispGDX
120A
ispGDX
160/A
ispGDX
80A
ispGDX
120A
ispGDX
160/A
13
LATTICE [ LATTICE SEMICONDUCTOR ]
