xa2c256 Xilinx Corp., xa2c256 Datasheet - Page 17

• Manufacturer Part Number: xa2c256
• Description: Coolrunner-ii Automotive Cpld
• Manufacturer: Xilinx Corp.

CoolRunner-II Automotive Requirements and Recommendations
Requirements
The following requirements are for all automotive applica-
tions:
1. Use a monotonic, fast ramp power supply to power up
2. Do not float I/O pins during device operation. Floating
DS555 (v1.1) May 5, 2007
Product Specification
CoolRunner-II . A V
required.
I/O pins can increase I
1-2 mA per floating input. In addition, when I/O pins are
floated, noise can propagate to the center of the CPLD.
R
V
CCIO1
V
I/O
I/O
I/O
I/O
I/O
I/O
I/O
GND
GND
V
AUX
NC
NC
NC
NC
NC
CC
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
(1)
(1)
(1)
(1)
(2)
(2)
(4)
CC
CC
ramp time of less than 1 ms is
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21
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23
24
25
26
27
28
29
30
31
32
33
34
35
36
1
2
3
4
5
6
7
8
9
as input buffers will draw
Figure 7: TQ144 Thin Quad Flat Pack
www.xilinx.com
Top View
TQG144
3. Do not drive I/O pins without V
4. Sink current when driving LEDs. Because all Xilinx
I/O pins should be appropriately terminated with
bus-hold or pull-up. Unused I/Os can also be configured
as C
CPLDs have N-channel pull-down transistors on
outputs, it is required that an LED anode is sourced
through a resistor externally to V
will give the brightest solution.
GND
(programmable GND).
XA2C256 CoolRunner-II Automotive CPLD
(1) - Global Output Enable
(2) - Global Clock
(3) - Global Set/Reset
(4) - Clock Divide Reset
(5) - DataGATE Enable
108
107
106
105
104
103
102
101
100
99
98
97
96
95
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93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
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CC
CC
GND
NC
NC
I/O
I/O
I/O
I/O
I/O
I/O
GND
I/O
I/O
I/O
I/O
I/O
V
I/O
I/O
GND
GND
I/O
I/O
I/O
I/O
V
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
NC
I/O
V
/V
CCIO1
CC
CCIO1
. Consequently, this
CCIO
powered.
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