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LPC4370 Datasheet(PDF) 58 Page - NXP Semiconductors |
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LPC4370 Datasheet(HTML) 58 Page - NXP Semiconductors |
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58 / 150 page  LPC4370 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved. Product data sheet Rev. 2 — 21 October 2013 58 of 150 NXP Semiconductors LPC4370 32-bit ARM Cortex-M4/M0 microcontroller One of the two SRAM blocks connected to the subsystem AHB matrix is typically used for code running on the M0 subsystem and the other SRAM block for data. This allows other bus masters to access the data SRAM without interrupting the M0 processor instruction fetches and thereby stalling the M0 subsystem. The M0 subsystem matrix runs at an asynchronous speed from the main matrix. This allows to operate the SGPIO at any desired frequency. The M0 subsystem can control the SGPIO in a deterministic way, without incurring latency that occurs when the M4 controls the SGPIO through a bridge. 7.4 Interprocessor communication The ARM Cortex-M4 and ARM Cortex-M0 interprocessor communication is based on using shared SRAM as mailbox and one processor raising an interrupt on the other processor's NVIC, for example after it has delivered a new message in the mailbox. The receiving processor can reply by raising an interrupt on the sending processor's NVIC to acknowledge the message. |
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