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EPM240 数据表(PDF) 40 Page - Altera Corporation

部件名 EPM240
功能描述  MAX II Device Family Data
Download  88 Pages
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制造商  ALTERA [Altera Corporation]
网页  http://www.altera.com
标志 ALTERA - Altera Corporation

EPM240 数据表(HTML) 40 Page - Altera Corporation

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2–32
Chapter 2: MAX II Architecture
Referenced Documents
MAX II Device Handbook
© October 2008
Altera Corporation
Connect VCCIO pins to either a 1.5-V, 1.8 V, 2.5-V, or 3.3-V power supply, depending
on the output requirements. The output levels are compatible with systems of the
same voltage as the power supply (that is, when VCCIO pins are connected to a 1.5-V
power supply, the output levels are compatible with 1.5-V systems). When VCCIO
pins are connected to a 3.3-V power supply, the output high is 3.3 V and is compatible
with 3.3-V or 5.0-V systems. Table 2–7 summarizes MAX II MultiVolt I/O support.
f For information about output pin source and sink current guidelines, refer to the AN
428: MAX II CPLD Design Guidelines.
Referenced Documents
This chapter referenced the following documents:
AN 428: MAX II CPLD Design Guidelines
DC and Switching Characteristics chapter in the MAX II Device Handbook
Hot Socketing and Power-On Reset in MAX II Devices chapter in the MAX II Device
Handbook
Using User Flash Memory in MAX II Devices chapter in the MAX II Device Handbook
Table 2–7. MAX II MultiVolt I/O Support (Note 1)
VCCIO (V)
Input Signal
Output Signal
1.5 V
1.8 V
2.5 V
3.3 V
5.0 V
1.5 V
1.8 V
2.5 V
3.3 V
5.0 V
1.5
vvv
v
v
——
——
1.8
vvv
v
v (2)
v
——
2.5
——
vv
v (3)
v (3)
v
——
3.3
——
v (4)
vv (5)
v (6)
v (6)
v (6)
vv (7)
Notes to Table 2–7:
(1) To drive inputs higher than VCCIO but less than 4.0 V including the overshoot, disable the I/O clamp diode. However, to drive 5.0-V inputs to the
device, enable the I/O clamp diode to prevent VI from rising above 4.0 V.
(2) When VCCIO = 1.8 V, a MAX II device can drive a 1.5-V device with 1.8-V tolerant inputs.
(3) When VCCIO = 2.5 V, a MAX II device can drive a 1.5-V or 1.8-V device with 2.5-V tolerant inputs.
(4) When VCCIO = 3.3 V and a 2.5-V input signal feeds an input pin, the VCCIO supply current will be slightly larger than expected.
(5) MAX II devices can be 5.0-V tolerant with the use of an external resistor and the internal I/O clamp diode on the EPM1270 and EPM2210
devices.
(6) When VCCIO = 3.3 V, a MAX II device can drive a 1.5-V, 1.8-V, or 2.5-V device with 3.3-V tolerant inputs.
(7) When VCCIO = 3.3 V, a MAX II device can drive a device with 5.0-V TTL inputs but not 5.0-V CMOS inputs. In the case of 5.0-V CMOS, open-
drain setting with internal I/O clamp diode (available only on EPM1270 and EPM2210 devices) and external resistor is required.


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