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M451
May. 4, 2018
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AHB Slave Interface
There are two AHB slave interfaces in flash memory controller, one is from both Cortex
®
-M4 I-
Bus and D-Bus for the instruction and data fetch; the other is from Cortex
®
-M4 S-Bus for flash
control registers access including ISP registers.
Cache Memory Controller
A 4 KB cache with zero wait cycle is implemented between Cortex
®
-M4 CPU and embedded
flash memory. This cache memory controller improves the flash access performance and
reduces power consumption of the embedded flash memory.
Flash Control Registers
All of ISP control and status registers are in the flash control registers. The detail registers
description is in the Register Description section
Flash Initialization Controller
When chip is powered on or active from reset, the flash initialization controller will start to
access flash automatically and check the flash stability, and also reload User Configuration
content to the flash control registers for system initiation.
Flash Operation Controller
The flash operations, such as flash erase, flash program, and flash read operation, have
specific control timing for embedded flash memory. The flash operation controller generates
those control timing by requested from the cache memory controller, the flash control registers
and the flash initialization controller.
Embedded Flash Memory
The embedded flash memory is the main memory for user application code and parameters. It
is consists of the user configuration block, 4KB LDROM and 40KB/72KB/128KB/ 256KB
APROM with Data Flash. The page erase flash size is 2KB, and minimum program bit size is 32
bits.
Содержание ARM Cortex NuMicro M451 Series
Страница 301: ...M451 May 4 2018 Page 301 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL...
Страница 324: ...M451 May 4 2018 Page 324 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL Figure 6 4 18 Checksum Calculation Flow...
Страница 355: ...M451 May 4 2018 Page 355 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL 2 0 Reserved Reserved...
Страница 625: ...M451 May 4 2018 Page 625 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL 00 5 bits 01 6 bits 10 7 bits 11 8 bits...
Страница 721: ...M451 May 4 2018 Page 721 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL the SCL line 1 0 Reserved Reserved...
Страница 1001: ...M451 May 4 2018 Page 1001 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL LQFP 64L 10x10x1 4 mm footprint 2 0 mm 9 2...
Страница 1002: ...M451 May 4 2018 Page 1002 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL LQFP 64L 7x7x1 4 mm footprint 2 0 mm 9 3...
Страница 1003: ...M451 May 4 2018 Page 1003 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL LQFP 48L 7x7x1 4mm footprint 2 0mm 9 4...