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參數(shù)資料
| 型號： | A42MX16-3BG100 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 40MX and 42MX FPGA Families |
| 中文描述： | 40MX和42MX FPGA系列 |
| 文件頁數(shù)： | 75/120頁 |
| 文件大?。?/td> | 854K |
| 代理商： | A42MX16-3BG100 |
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58
4958B–AUTO–11/10
Atmel ATA6285/ATA6286 [Preliminary]
3.12.2.5
Digital Input Enable and Sleep Modes
As shown in Figure 3-22 on page 55, the digital input signal can be clamped to ground at the
input of the schmitt-trigger. The signal denoted SLEEP in the figure, is set by the MCU Sleep
Controller in Power-down mode, Power-save mode, and Standby mode to avoid high power
consumption even if some input signals are left floating, or have an analog signal level close to
V
CC/2.
SLEEP is overridden for port pins enabled as external interrupt pins. If the external interrupt
request is not enabled, SLEEP is active also for these pins. SLEEP is also overridden by various
other alternate functions as described in Section 3.12.3 “Alternate Port Functions” on page 59.
If a logic high level (“one”) is present on an asynchronous external interrupt pin configured as
“Interrupt on Rising Edge, Falling Edge, or Any Logic Change on Pin” while the external interrupt
is not enabled, the corresponding External Interrupt Flag will be set when resuming from the
above mentioned Sleep mode, as the clamping in these sleep mode produces the requested
logic change.
3.12.2.6
Unconnected Pins
If some pins are unused, it is recommended to ensure that these pins have a defined level. Even
though most of the digital inputs are disabled in the deep sleep modes as described above, float-
ing inputs should be avoided to reduce current consumption in all other modes where the digital
inputs are enabled (Reset, Active mode and Idle mode).
The simplest method to ensure a defined level of an unused pin is to enable the internal pull-up.
In this case, the pull-up will be disabled during reset. If low power consumption during reset is
important, it is recommended to use an external pull-up or pull-down. Connecting unused pins
directly to VCC or GND is not recommended, since this may cause excessive currents if the pin
is accidentally configured as an output.
相關PDF資料 |
PDF描述 |
|---|---|
| A42MX16-3PL100 | 40MX and 42MX FPGA Families |
| A42MX16-3PL100A | 40MX and 42MX FPGA Families |
| A42MX16-3PQ100A | 40MX and 42MX FPGA Families |
| A42MX16-3VQ100 | 40MX and 42MX FPGA Families |
| A42MX16-3VQ100A | 40MX and 42MX FPGA Families |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| A42MX16-3BG100A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:40MX and 42MX FPGA Families |
| A42MX16-3BG100B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:40MX and 42MX FPGA Families |
| A42MX16-3BG100ES | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:40MX and 42MX FPGA Families |
| A42MX16-3BG100I | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:40MX and 42MX FPGA Families |
| A42MX16-3BG100M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:40MX and 42MX FPGA Families |
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