MC9S08GT32CFD Freescale Semiconductor, MC9S08GT32CFD Datasheet - Page 35
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MC9S08GT32CFD
Manufacturer Part Number
MC9S08GT32CFD
Description
MCU 8BIT 32K FLASH 48-QFN
Manufacturer
Freescale Semiconductor
Series
HCS08r
Datasheet
1.M68EVB908GB60E.pdf
(290 pages)
Specifications of MC9S08GT32CFD
Core Processor
HCS08
Core Size
8-Bit
Speed
40MHz
Connectivity
I²C, SCI, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
39
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 3.6 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
48-QFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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Table 3-1
1
2
3.6.1
The stop1 mode provides the lowest possible standby power consumption by causing the internal circuitry
of the MCU to be powered down. Stop1 can be entered only if the LVD circuit is not enabled in stop modes
(either LVDE or LVDSE not set).
When the MCU is in stop1 mode, all internal circuits that are powered from the voltage regulator are turned
off. The voltage regulator is in a low-power standby state, as is the ATD.
Exit from stop1 is performed by asserting either of the wake-up pins on the MCU: RESET or IRQ. IRQ is
always an active low input when the MCU is in stop1, regardless of how it was configured before entering
stop1.
Entering stop1 mode automatically asserts LVD. Stop1 cannot be exited until V
must rise above the LVI rearm voltage).
Upon wake-up from stop1 mode, the MCU will start up as from a power-on reset (POR). The CPU will
take the reset vector.
3.6.2
The stop2 mode provides very low standby power consumption and maintains the contents of RAM and
the current state of all of the I/O pins. Stop2 can be entered only if the LVD circuit is not enabled in stop
modes (either LVDE or LVDSE not set).
Before entering stop2 mode, the user must save the contents of the I/O port registers, as well as any other
memory-mapped registers they want to restore after exit of stop2, to locations in RAM. Upon exit of stop2,
these values can be restored by user software before pin latches are opened.
When the MCU is in stop2 mode, all internal circuits that are powered from the voltage regulator are turned
off, except for the RAM. The voltage regulator is in a low-power standby state, as is the ATD. Upon entry
into stop2, the states of the I/O pins are latched. The states are held while in stop2 mode and after exiting
stop2 mode until a 1 is written to PPDACK in SPMSC2.
Freescale Semiconductor
Mode
Stop1
Stop2
Stop3
Either ATD stop mode or power-down mode depending on the state of ATDPU.
Crystal oscillator can be configured to run in stop3. Please see the ICG registers.
summarizes the behavior of the MCU in each of the stop modes.
PDC
Stop1 Mode
Stop2 Mode
1
1
0
PPDC
Don’t
care
0
1
CPU, Digital
Peripherals,
Standby
FLASH
Off
Off
MC9S08GB/GT Data Sheet, Rev. 2.3
Table 3-1. Stop Mode Behavior
Standby
Standby
RAM
Off
ICG
Off
Off
Off
2
Disabled
Disabled
Disabled
ATD
1
Regulator
Standby
Standby
Off
DD
> V
I/O Pins
States
States
Reset
held
held
LVDH/L
Optionally on
Optionally on
rising (V
Stop Modes
RTI
Off
DD
35
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