LFX125EB-03F256I LATTICE SEMICONDUCTOR, LFX125EB-03F256I Datasheet - Page 14

• Manufacturer Part Number: LFX125EB-03F256I
• Description: FPGA ispXPGA® Family 139K Gates 1936 Cells EECMOS Technology 2.5V/3.3V 256-Pin FBGA
• Manufacturer: LATTICE SEMICONDUCTOR

Specifications of LFX125EB-03F256I

• Package: 256FBGA
• Family Name: ispXPGA®
• Device Logic Units: 1936
• Device System Gates: 139000
• Number Of Registers: 3800
• Typical Operating Supply Voltage: 2.5|3.3 V
• Maximum Number Of User I/os: 160
• Ram Bits: 94208
• Re-programmability Support: Yes

Lattice Semiconductor
Figure 10. ispXPGA PIC
Programmable Input/Output
The PIO is the building block of a PIC. The PIO has a total of 11 inputs and five outputs. Nine of the 11 inputs are
generated from routing. The inputs from routing are the PIO Input (IN), Feed-Thru (FT), Clock (CLK), Input Clock
Enable (ICE), Input Set/Reset (ISR), Output Clock Enable (OCEN), Output Set/Reset (OSR), PIO Output Enable
(OEN), and PIO Input Enable (IEN). The remaining inputs are the sysIO input buffer signal and the Global Set/
Reset signal. Three of the five outputs (OUT0, OUT1, and OE) feed routing. The last two outputs feed the sysIO
buffer directly as the output and output enable of the sysIO output buffer.
PIOs associated with sysHSI blocks contain two additional inputs and outputs to support the sysHSI block. The two
inputs come from the sysHSI block associated with the PIO, and the two outputs feed the sysHSI block. One of the
inputs routes directly through the PIO to routing, while the other is multiplexed with the Feed-Thru, register bypass,
and Q output of the register to form the OUT1 output of the PIO. The outputs to the sysHSI block are the same sig-
nals as the outputs which feed the sysIO buffers (sysIO Output and sysIO Output Enable).
Each PIO has an input register, an output register, and an output enable register as shown in Figure 11. The input
register path of the PIO has a ‘delay’ option, which slows the data-flow. A two-input OR function of the Global Set/
Reset (GSR) and Set/Reset (ISR or OSR) signals creates the set/reset term for the respective registers. Each PIO
has two pairs of set/reset and clock enable signals. One is exclusive to the input register, whereas the other is com-
mon for both the output and output enable registers. The clock (CLK) is common to all registers in a PIO, and the
polarity of the clock is controllable. The input, output, and the output enable registers can be configured as a latch
or D-type flip-flop. Each PIO is capable of generating an output enable signal, which in turn becomes a PIC output.
associated with
sysHSI blocks
Only for PICs
sysIO
sysIO
From sysHSI block
From sysHSI block
To sysHSI block
To sysHSI block
From routing
From routing
GSR
9
2
2
2
2
9
10
PIO0
PIO1
PIC
OE1 OE0
2
2
ispXPGA Family Data Sheet
To routing
To routing
To routing
To routing
associated with
sysHSI blocks
Only for PICs