Simplified Block Diagram for Digital Cockpit Processing Unit (DCPU) shows a simplified DCPU to illustrate the logic and translation use cases. Each red block has an associated use-case document; links are provided in Table 1 and Table 2. For a more complete block diagram, see the interactive online end equipment reference diagram for DCPUs.
Each use case links to a separate document that provides additional details including a block diagram, design tips, and part recommendations. The nearest block and use-case identifiers are listed to match to the use cases shown in the provided simplified block diagram.
Nearest Block | Use-Case Identifier | Use Case |
---|---|---|
Processing Unit System Power | Power Good Combination | Combine Power Good Signals |
Debug Console | Fault Combination | Use Fewer Inputs to Monitor Error Signals |
Logic and Translation | Driving LEDs | Drive Indicator LEDs |
I/O Expansion | Increase the Number of Outputs on a Microcontroller |
Nearest Block | Use-Case Identifier | Use Case |
---|---|---|
VIP MCU | I2C | Translate Voltages for I2C |
Logic and Translation | UART | Translate Voltages for UART |
GPIO | Translate Voltages for GPIO |
System controllers can use GPIO pins to reset other components if a fault is detected; however, system controllers generally cannot reset themselves or their entire system. By using a monostable multivibrator, the system controller can reset the entire system.
Part Number | AEC-Q100 | VCC Range | Function | Features |
---|---|---|---|---|
SN74LVC1G123 | 1.65 V – 5.5 V | Single-channel multivibrator | Retriggerable, Schmitt-trigger inputs | |
SN74LV123A | 2 V – 5.5 V | Dual-channel multivibrator | Retriggerable, Schmitt-trigger inputs, inverted output | |
SN74LV123A-Q1 | ✓ | |||
SN74LV221A | 2 V – 5.5 V | Dual-channel multivibrator | Schmitt-trigger inputs, inverted output | |
SN74LV221A-Q1 | ✓ | |||
SN74AHC1G04 | 2 V – 5.5 V | Single-channel inverting buffer | ||
SN74AHC1G04-Q1 | ✓ |
For more devices, browse through the online parametric tool which allows users to sort by desired voltage, channel numbers, and other features.
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