m4-128n-64-10ai Lattice Semiconductor Corp., m4-128n-64-10ai Datasheet - Page 14
m4-128n-64-10ai
Manufacturer Part Number
m4-128n-64-10ai
Description
High Performance E Cmos In-system Programmable Logic
Manufacturer
Lattice Semiconductor Corp.
Datasheet
1.M4-128N-64-10AI.pdf
(46 pages)
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Output Switch Matrix
The output switch matrix allows macrocells to be connected to any of several I/O cells within a
PAL block. This provides high flexibility in determining pinout and allows design changes to
occur without effecting pinout.
In MACH 4 devices with 2:1 Macrocell-I/O cell ratio, each PAL block has twice as many
macrocells as I/O cells. The MACH 4 output switch matrix allows for half of the macrocells to
drive I/O cells within a PAL block, in combinations according to Figure 9. Each I/O cell can
choose from eight macrocells; each macrocell has a choice of four I/O cells. The MACH 4 devices
with 1:1 Macrocell-I/O cell ratio allow each macrocell to drive one of eight I/O cells (Figure 9).
14
Each I/O cell can
choose one of 8
macrocells in
all MACH 4
devices.
Figure 9. MACH 4 Output Switch Matrix
2:1 macrocell-I/O cell ratio.
Each macrocell can drive
MACH 4 devices with
M10
M11
M12
M13
M14
M15
one of 4 I/O cells in
M0
M1
M2
M3
M4
M5
M6
M7
M8
M9
MACH 4 Family
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
Each macrocell can drive
M4(LV)-32/32 devices.
M10
M11
M12
M13
M14
M15
one of 8 I/O cells in
M0
M1
M2
M3
M4
M5
M6
M7
M8
M9
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
I/O8
I/O9
I/O10
I/O11
I/O12
I/O13
I/O14
I/O15
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