Lattice Semiconductor
Table 10. ORP Combinations for I/O Blocks with 12 I/Os
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
I/O 8
I/O 9
I/O 10
I/O 11
M0, M1, M2, M3, M4, M5, M6, M7
M1, M2, M3, M4, M5, M6, M7, M8
M2, M3, M4, M5, M6, M7, M8, M9
M4, M5, M6, M7, M8, M9, M10, M11
M5, M6, M7, M8, M9, M10, M11, M12
M6, M7, M8, M9, M10, M11, M12, M13
M8, M9, M10, M11, M12, M13, M14, M15
M9, M10, M11, M12, M13, M14, M15, M0
M10, M11, M12, M13, M14, M15, M0, M1
M12, M13, M14, M15, M0, M1, M2, M3
M13, M14, M15, M0, M1, M2, M3, M4
M14, M15, M0, M1, M2, M3, M4, M5
ispMACH 4000V/B/C/Z Family Data Sheet
Available Macrocells
ORP Bypass and Fast Output Multiplexers
The ORP bypass and fast-path output multiplexer is a 4:1 multiplexer and allows the 5-PT fast path to bypass the
ORP and be connected directly to the pin with either the regular output or the inverted output. This multiplexer also
allows the register output to bypass the ORP to achieve faster t
CO
.
Output Enable Routing Multiplexers
The OE Routing Pool provides the corresponding local output enable (OE) product term to the I/O cell.
I/O Cell
The I/O cell contains the following programmable elements: output buffer, input buffer, OE multiplexer and bus
maintenance circuitry. Figure 8 details the I/O cell.
Figure 8. I/O Cell
GOE 0
GOE 1
GOE 2
GOE 3
From ORP
VCC
V
CCO
V
CCO
From ORP
To Macrocell
To GRP
*Global fuses
*
*
*
Each output supports a variety of output standards dependent on the V
CCO
supplied to its I/O bank. Outputs can
also be configured for open drain operation. Each input can be programmed to support a variety of standards, inde-
pendent of the V
CCO
supplied to its I/O bank. The I/O standards supported are:
11
LATTICE [ LATTICE SEMICONDUCTOR ]
