10321111 Datasheet, PDF (10/19 Pages) Lattice Semiconductor – High-Density Programmable Logic

Specifications ispLSI and pLSI 1032
In-System Programmability
The ispLSI devices are the in-system programmable
versions of the Lattice Semiconductor High-Density pro-
grammable Large Scale Integration (pLSI) devices. By
integrating all the high voltage programming circuitry on-
chip, programming can be accomplished by simply shifting
data into the device. Once the function is programmed,
the non-volatile E²CMOS cells will not lose the pattern
even when the power is turned off.
controls the programming. The interface signals are isp
Enable (ispEN), Serial Data In (SDI), Serial Data Out
(SDO), Serial Clock (SCLK) and Mode (MODE) control.
Figure 4 illustrates the block diagram of one possible
scheme for programming the ispLSI devices. For details
on the operation of the internal state machine and pro-
gramming of the device please refer to the ISP Architecture
and Programming section in this Data Book.
All necessary programming is done via five TTL level The device identifier for the ispLSI 1032 is 0000 0011
logic interface signals. These five signals are fed into the (03 hex). This code is the unique device identifier which
on-chip programming circuitry where a state machine is generated when a read ID command is performed.
Figure 4. ISP Programming Interface
SDO
SDI
MODE
SCLK
ispEN
5-wire ISP
Programming
Interface
ispEN
SCLK
MODE
ispLSI
SDI
SDO
SCLK
MODE
ispGAL
SDI
SDO
SCLK
MODE
ispGDS
SDI
SDO
ispEN
SCLK
MODE
ispLSI
SDI
SDO
0294B
10
1996 ISP Encyclopedia