LC4256V-75FT256BC LATTICE SEMICONDUCTOR, LC4256V-75FT256BC Datasheet - Page 9

• Manufacturer Part Number: LC4256V-75FT256BC
• Description: CPLD ispMACH® 4000V Family 256 Macro Cells 168MHz EECMOS Technology 3.3V 256-Pin FTBGA
• Manufacturer: LATTICE SEMICONDUCTOR

Specifications of LC4256V-75FT256BC

• Package: 256FTBGA
• Family Name: ispMACH® 4000V
• Maximum Propagation Delay Time: 7.5 ns
• Number Of User I/os: 160
• Number Of Logic Blocks/elements: 36
• Typical Operating Supply Voltage: 3.3 V
• Maximum Operating Frequency: 168 MHz
• Number Of Product Terms Per Macro: 80
• Memory Type: EEPROM
• Operating Temperature: 0 to 90 °C

Lattice Semiconductor
Output Routing Pool (ORP)
The Output Routing Pool allows macrocell outputs to be connected to any of several I/O cells within an I/O block.
This provides greater flexibility in determining the pinout and allows design changes to occur without affecting the
pinout. The output routing pool also provides a parallel capability for routing macrocell-level OE product terms. This
allows the OE product term to follow the macrocell output as it is switched between I/O cells. Additionally, the out-
put routing pool allows the macrocell output or true and complement forms of the 5-PT bypass signal to bypass the
output routing multiplexers and feed the I/O cell directly. The enhanced ORP of the ispMACH 4000 family consists
of the following elements:
Figure 7 shows the structure of the ORP from the I/O cell perspective. This is referred to as an ORP slice. Each
ORP has as many ORP slices as there are I/O cells in the corresponding I/O block.
Figure 7. ORP Slice
Output Routing Multiplexers
The details of connections between the macrocells and the I/O cells vary across devices and within a device
dependent on the maximum number of I/Os available. Tables 5-9 provide the connection details.
Table 6. ORP Combinations for I/O Blocks with 8 I/Os
• Output Routing Multiplexers
• OE Routing Multiplexers
• Output Routing Pool Bypass Multiplexers
I/O Cell
I/O 0
I/O 1
I/O 2
I/O 3
I/O 4
I/O 5
I/O 6
I/O 7
M0, M1, M2, M3, M4, M5, M6, M7
M2, M3, M4, M5, M6, M7, M8, M9
M4, M5, M6, M7, M8, M9, M10, M11
M6, M7, M8, M9, M10, M11, M12, M13
M8, M9, M10, M11, M12, M13, M14, M15
M10, M11, M12, M13, M14, M15, M0, M1
M12, M13, M14, M15, M0, M1, M2, M3
M14, M15, M0, M1, M2, M3, M4, M5
From PTOE
5-PT Fast Path
From Macrocell
Output Routing Multiplexer
OE Routing Multiplexer
9
Available Macrocells
ispMACH 4000V/B/C/Z Family Data Sheet
ORP
Bypass
Multiplexer
OE
Output
To I/O
To I/O
Cell
Cell