MC9S08RE16FDE Freescale Semiconductor, MC9S08RE16FDE Datasheet - Page 30
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MC9S08RE16FDE
Manufacturer Part Number
MC9S08RE16FDE
Description
IC MCU 16K FLASH 1K RAM 48-QFN
Manufacturer
Freescale Semiconductor
Series
HCS08r
Specifications of MC9S08RE16FDE
Core Processor
HCS08
Core Size
8-Bit
Speed
8MHz
Connectivity
SCI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
39
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 3.6 V
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
48-QFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
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Modes of Operation
After active background mode is entered, the CPU is held in a suspended state waiting for serial
background commands rather than executing instructions from the user’s application program.
Background commands are of two types:
The active background mode is used to program a bootloader or user application program into the FLASH
program memory before the MCU is operated in run mode for the first time. When the
MC9S08RC/RD/RE/RG is shipped from the Freescale Semiconductor factory, the FLASH program
memory is usually erased so there is no program that could be executed in run mode until the FLASH
memory is initially programmed. The active background mode can also be used to erase and reprogram
the FLASH memory after it has been previously programmed.
For additional information about the active background mode, refer to the
3.5
Wait mode is entered by executing a WAIT instruction. Upon execution of the WAIT instruction, the CPU
enters a low-power state in which it is not clocked. The I bit in CCR is cleared when the CPU enters the
wait mode, enabling interrupts. When an interrupt request occurs, the CPU exits the wait mode and
resumes processing, beginning with the stacking operations leading to the interrupt service routine.
Only the BACKGROUND command and memory-access-with-status commands are available when the
MCU is in wait mode. The memory-access-with-status commands do not allow memory access, but they
report an error indicating that the MCU is in either stop or wait mode. The BACKGROUND command can
be used to wake the MCU from wait mode and enter active background mode.
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Non-intrusive commands, defined as commands that can be issued while the user program is
running. Non-intrusive commands can be issued through the BKGD pin while the MCU is in run
mode; non-intrusive commands can also be executed when the MCU is in the active background
mode. Non-intrusive commands include:
— Memory access commands
— Memory-access-with-status commands
— BDC register access commands
— BACKGROUND command
Active background commands, which can only be executed while the MCU is in active background
mode, include commands to:
— Read or write CPU registers
— Trace one user program instruction at a time
— Leave active background mode to return to the user’s application program (GO)
Wait Mode
MC9S08RC/RD/RE/RG Data Sheet, Rev. 1.11
Development Support
Freescale Semiconductor
chapter.
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