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STM32H523CCU6 データシート(PDF) 24 Page - STMicroelectronics |
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STM32H523CCU6 データシート(HTML) 24 Page - STMicroelectronics |
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24 / 228 page  Functional overview STM32H523xx 24/228 DS14540 Rev 1 When TrustZone is enabled the boot space must be in secure area. SECBOOTADD0[24:0] option bytes are used to select the boot secure memory address. A unique boot entry option can be selected by setting the SECBOOT_LOCK option bit. 3.8 Global TrustZone controller (GTZC) GTZC is used to configure TrustZone and privileged attributes within the full system. The GTZC includes three different sub-blocks: • TZSC: TrustZone security controller This sub-block defines the secure/privilege state of slave/master peripherals. It also controls the non-secure area size for the watermark memory peripheral controller (MPCWM). The TZSC block informs some peripherals (such as RCC or GPIOs) about the secure status of each securable peripheral, by sharing with RCC and I/O logic. • TZIC: TrustZone illegal access controller This sub-block gathers all security illegal access events in the system and generates a secure interrupt towards NVIC. • MPCBB: MPCBB: block-based memory protection controller This sub-block controls secure states of all memory blocks (512-byte pages) of the associated SRAM. This peripheral aims at configuring the internal RAM in a TrustZone system product having segmented SRAM with programmable-security and privileged attributes. The GTZC main features are: • Three independent 32-bit AHB interfaces for TZSC, TZIC and MPCBB • MPCBB and TZIC accessible only with secure transactions – Enable illegal access events that may trigger a secure interrupt • Secure and non-secure access supported for privileged/non-privileged part of TZSC • Set of registers to define product security settings: – Secure/privilege regions for external memories – Secure/privilege access mode for securable peripherals – Secure/privilege access mode for securable legacy masters Table 4. STM32H523 boot mode when TrustZone is enabled (TZEN = 0xB4) PRODUCT_STATE BOOT0 pin Boot address option- byte selection Boot area ST programmed default value Open 0 SECBOOTADD[31:8] Boot address defined by user option byte SECBOOTADD[31:8] Flash: 0x0C00 0000 - 1 NA Bootloader Bootloader Provisioning x NA RSS RSS Provisioned, TZ_Closed, Closed, Locked x SECBOOTADD[31:8] Boot address defined by user option byte SECBOOTADD[31:8] Flash: 0x0C00 0000 |
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