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参数资料
| 型号： | MM908E630CVFC |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | MICROCONTROLLER, QCC44 |
| 封装： | 9 X 9 MM, 1 MM HEIGHT, 0.65 MM PITCH, ROHS COMPLIANT, QFN-44 |
| 文件页数： | 16/48页 |
| 文件大小： | 2299K |
| 代理商： | MM908E630CVFC |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
23
908E630
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
MODES OF OPERATION
The 908E630 offers three operating modes: Normal (Run),
Stop and Sleep (Low Power). In Normal mode, the device is
active and is operating under normal application conditions.
The Stop and Sleep modes are low power modes with wake-
up capabilities.
In Stop mode, the voltage regulator still supplies the MCU
die with VDD (limited current capability) and in Sleep mode,
the voltage regulator is turned off (VDD = 0 V).
Wake-up from Stop mode is initiated by a wake-up
interrupt. Wake-up from Sleep mode is done by a reset, and
the voltage regulator is turned back on.
The selection of the different modes is controlled by the
MOD1:2 bits in the SPI - Mode Control register (MCR).
Figure 12 describes how transitions are done between the
the operating mode.
RESET MODE
The analog die enters in Reset mode after a power up. In
this mode, the RST_A pin is low for 1.0 ms typical value. After
this delay, the analog die enters in Normal Request mode
and the RST_A pin is driving High.
The Reset mode is entered if a reset condition occurs (VDD
low, watchdog trigger failed, after a wake-up from Sleep
mode, Normal Request mode time-out expired).
NORMAL REQUEST MODE
This is a temporary mode automatically accessed by the
device after the reset mode, or after a wake-up from Stop
mode.
In Normal Request mode, the VDD regulator is ON, the
Reset pin is High and the LIN is operating in Rx Only mode.
As soon as the device enters in Normal Request mode an
internal timer is started for 150 ms typical value. During these
150 ms, the MCU die must configure the Timing Control
Register and the Mode Control Register with MOD2 and
MOD1 bits to enter in Normal mode. If within the 150 ms time-
out the MCU die does not command the analog die to Normal
mode, it will enter in Reset mode. If the WDCONF pin is
grounded in order to disable the watchdog function, the
analog die goes directly in Normal mode after the Reset
mode.
NORMAL MODE
In Normal mode, all analog die functions are active and
can be controlled by the SPI interface and the PWMIN pin.
The VDD regulator is ON and delivers its full current
capability.
If an external resistor is connected between the WDCONF
pin and ground, the window watchdog function will be
enabled.
The wake-up inputs (L1-L4) can be read as digital inputs
or have its voltage routed through the analog-multiplexer.
The LIN interface has slew rate and timing compatible with
the LIN protocol specification 2.0.The LIN bus can transmit
and receive information.
The high sides and low sides switches are active and have
PWM capability, according to the SPI configuration.
The interrupts are generated to report failure as VSUP over/
under-voltage, thermal shutdown or thermal shutdown
prewarning on the main regulator.
SLEEP MODE
The Sleep mode is a low power mode. From Normal
mode, the device enters in Sleep mode by sending one SPI
command through the MCR register. All blocks are in their
lowest consumption condition. Only some wake-up sources
(wake-up inputs with or without cyclic sense, Forced wake-up
and LIN receiver) are active. The 5,0 V regulator is OFF. The
internal low-power oscillator may be active if the IC is
configured for cyclic-sense. In this condition, one of the high
side switches is turned on periodically and the wake-up
inputs are sampled.
Waking-up from Sleep mode is similar to a power-up, the
device goes in Reset mode except that the SPI will report the
wake-up source and the BATFAIL flag is not set.
STOP MODE
The Stop mode is the second low power mode, but in this
case the 5.0 V regulator is ON with limited current capability
(5.0 mA). The MCU die is always supplied while the analog
die is turned into power saving condition.
The device can enter in Stop mode only by sending the
SPI command. When the application is in this mode, it can
wake-up from SBC side (for example: cyclic sense, force
wake-up, LIN bus, wake inputs) or MCU side (CS, RST pins).
Waking from Stop mode will transition the analog die to
Normal Request mode and generates an interrupt except if
the wake-up event is a low to high transition on CS or comes
from the RST_A pin.
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