s908gz60cfa Freescale Semiconductor, Inc, s908gz60cfa Datasheet - Page 52

• Manufacturer Part Number: s908gz60cfa
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Memory
2.6.7 Low-Power Modes
The WAIT and STOP instructions will place the MCU in low power-consumption standby modes.
2.6.7.1 Wait Mode
Putting the MCU into wait mode while the FLASH is in read mode does not affect the operation of the
FLASH memory directly; however, no memory activity will take place since the CPU is inactive.
The WAIT instruction should not be executed while performing a program or erase operation on the
FLASH. Wait mode will suspend any FLASH program/erase operations and leave the memory in a
standby mode.
2.6.7.2 Stop Mode
Putting the MCU into stop mode while the FLASH is in read mode does not affect the operation of the
FLASH memory directly; however, no memory activity will take place since the CPU is inactive.
The STOP instruction should not be executed while performing a program or erase operation on the
FLASH. Stop mode will suspend any FLASH program/erase operations and leave the memory in a
standby mode.
2.7 FLASH-2 Memory (FLASH-2)
This subsection describes the operation of the embedded FLASH-2 memory. This memory can be read,
programmed, and erased from a single external supply. The program and erase operations are enabled
through the use of an internal charge pump.
2.7.1 Functional Description
The FLASH-2 memory is a non-continuous array consisting of a total of 29,822 bytes. An erased bit reads
as a 1 and a programmed bit reads as a 0.
Memory in the FLASH-2 array is organized into rows within pages. There are two rows of memory per
page with 64 bytes per row. The minimum erase block size is a single page,128 bytes. Programming is
performed on a per-row basis, 64 bytes at a time. Program and erase operations are facilitated through
control bits in the FLASH-2 control register (FL2CR). Details for these operations appear later in this
subsection.
The FLASH-2 memory map consists of:
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$0462–$04FF: user memory (158 bytes)
$0980–$1B7F: user memory (4608 bytes)
$1E20–$7FFF: user memory (25056 bytes)
$FF81: FLASH-2 block protect register (FL2BPR)
$FE08: FLASH-2 control register (FL2CR)
Standby mode is the power saving mode of the FLASH module, in which all
internal control signals to the FLASH are inactive and the current
consumption of the FLASH is minimum.
FL2BPR physically resides within FLASH-1 memory addressing space
MC68HC908GZ60 • MC68HC908GZ48 • MC68HC908GZ32 Data Sheet, Rev. 6
NOTE
NOTE
Freescale Semiconductor