AT32UC3C1512C Automotive Atmel Corporation, AT32UC3C1512C Automotive Datasheet - Page 252

• Manufacturer Part Number: AT32UC3C1512C Automotive
• Manufacturer: Atmel Corporation

15. Flash Controller (FLASHC)
15.1
15.2
15.3
15.3.1
15.3.2
15.3.3
9166C–AVR-08/11
Features
Overview
Product Dependencies
Power Management
Clocks
Interrupt
Rev: 3.0.2.2
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The Flash Controller (FLASHC) interfaces the on-chip flash memory with the 32-bit internal HSB
bus. The controller manages the reading, writing, erasing, locking, and unlocking sequences.
In order to use this module, other parts of the system must be configured correctly, as described
below.
If the CPU enters a sleep mode that disables clocks used by the FLASHC, the FLASHC will stop
functioning and resume operation after the system wakes up from sleep mode.
The FLASHC has two bus clocks connected: One High Speed Bus clock (CLK_FLASHC_HSB)
and one Peripheral Bus clock (CLK_FLASHC_PB). These clocks are generated by the Power
Manager. Both clocks are enabled at reset, and can be disabled by writing to the Power Man-
ager. The user has to ensure that CLK_FLASHC_HSB is not turned off before reading the flash
or writing the pagebuffer and that CLK_FLASHC_PB is not turned off before accessing the
FLASHC configuration and control registers. Failing to do so may deadlock the bus.
The FLASHC interrupt request lines are connected to the interrupt controller. Using the FLASHC
interrupts requires the interrupt controller to be programmed first.
Controls flash block with dual read ports allowing staggered reads.
Supports 0 and 1 wait state bus access.
Allows interleaved burst reads for systems with one wait state, outputting one 32-bit word per
clock cycle.
32-bit HSB interface for reads from flash array and writes to page buffer.
32-bit PB interface for issuing commands to and configuration of the controller.
16 lock bits, each protecting a region consisting of (total number of pages in the flash block / 16)
pages.
Regions can be individually protected or unprotected.
Additional protection of the Boot Loader pages.
Supports reads and writes of general-purpose NVM bits.
Supports reads and writes of additional NVM pages.
Supports device protection through a security bit.
Dedicated command for chip-erase, first erasing all on-chip volatile memories before erasing
flash and clearing security bit.
AT32UC3C
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