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RM0352 Folha de dados(PDF) 12 Page - STMicroelectronics

Nome de Peças RM0352
Descrição Electrónicos  Brain smart hub family
PDF  138 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

RM0352 Folha de dados(HTML) 12 Page - STMicroelectronics

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System and memory overview
RM0352
12/138
DocID024647 Rev 1
2
System and memory overview
2.1
System architecture
The main system consists of:
•
One master:
–
Cortex-M0 core AHB bus
•
Four slaves:
–
Internal 64 KByte SRAM for program or data with ECC referred as RAM bank0
–
Internal 64 KByte SRAM for program or data referred as RAM bank1
–
Internal 64 KByte Flash memory
–
AHB to APB, which connects all the APB peripherals
These are interconnected using an AHB-Lite bus architecture as shown in
Figure 1:
Figure 1. System architecture
Bus address decode
The bus address decode manages the access to slave peripherals through an AHB-Lite
protocol.
AHB2APB bridge (APB)
The AHB2APB bridge provides full synchronous connection between the AHB and the APB
bus. Refer to
Table 2 for the address mapping of the peripherals connected to this bridge.
After each device reset, all APB peripheral clocks are disabled, except CRMU clock.
Before using a peripheral you have to enable its clock in the CCR2 register in the CRMU.
Note:
The APB protocol does not support partial word access. 8- or 16-bit AHB access is
transformed into 32-bit access.



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