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| 型號： | MC33989DWR2 |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 18/72頁 |
| 文件大小： | 0K |
| 描述： | IC SYSTEM BASE W/CAN 28-SOIC |
| 標準包裝： | 1 |
| 控制器類型： | 系統(tǒng)基礎(chǔ)芯片 |
| 接口： | CAN |
| 電源電壓： | 5.5 V ~ 18 V |
| 電流 - 電源： | 45mA |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-SOIC（0.295"，7.50mm 寬） |
| 供應商設(shè)備封裝： | 28-SOIC W |
| 包裝： | 剪切帶 (CT) |
| 配用： | KIT33989DWEVB-ND - KIT EVAL 33989DW HS SBC |
| 其它名稱： | MC33989DWR2CT |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
25
33989
FUNCTIONAL DEVICE OPERATION
RESET AND WATCHDOG PINS, SOFTWARE WATCHDOG OPERATIONS
Figure 10. Reset and Watchdog Functions Diagram in Modes 1 and 2
WAKE-UP CAPABILITIES
Several wake-up capabilities are available for the device when it is in Sleep, or Stop modes. When a wake-up has occurred,
the wake-up event is stored into the WUR or CAN registers. The MCU can then access to the wake-up source. The wake-up
options are able to be selected through the SPI while the device is in Normal or Standby mode and prior to entering low power
mode (Sleep or Stop mode). When a wake-up occurs from sleep mode the device activates VDD1. It generates an interrupt if
wake-up occurs from Stop mode.
WAKE-UP FROM WAKE-UP INPUTS (L0:L3) WITHOUT CYCLIC SENSE
The wake-up lines are dedicated to sense external switch states and if changes occur to wake-up the MCU (in Sleep or Stop
modes). The wake-up pins are able to handle 40 V DC. The internal threshold is 3.0 V typical and these inputs can be used as
an input port expander. The wake-up inputs state are read through SPI (register WUR).
In order to select and activate direct wake-up from the LX inputs, the WUR register must be configured with the appropriate
level sensitivity. Additionally, the LPC register must be configured with 0x0 data (bits LX2HS1and HS1AUTO are set at 0).
Level sensitivity is selected by WUR register. Level sensitivity is configured by a pair of Lx inputs: L0 and L1 level sensitivity
are configured together while L2 and L3 are configured together.
CYCLIC SENSE WAKE-UP (CYCLIC SENSE TIMER AND WAKE-UP INPUTS L0, L1, L2, L3)
The SBC can wake-up upon state change of one of the four wake-up input lines (L0, L1, L2 and L3) while the external pull-up
or pull down resistor of the switches associated to the wake-up input lines are biased with HS1 VSUP switch. The HS1 switch is
activated in Sleep or Stop modes from an internal timer. Cyclic Sense and Forced Wake-up are exclusive. If Cyclic Sense is
enabled the forced wake-up can not be enabled.
In order to select and activate the cyclic sense wake-up from the Lx inputs the WUR register must be configured with the
appropriate level sensitivity, and the LPC register must be configured with 1xx1 data (bit LX2HS1 set at 1 and bit HS1AUTO set
at 1). The wake-up mode selection (direct or cyclic sense) is valid for all 4 wake-up inputs.
FORCED WAKE-UP
The SBC can wake-up automatically after a predetermined time spent in Sleep or Stop mode. Cyclic sense and Forced wake-
up are exclusive. If Forced wake-up is enabled (FWU bit set to 1 in LPC register) the Cyclic Sense can not be enabled.
CAN INTERFACE WAKE-UP
The device incorporates a high-speed 1MBaud CAN physical interface. Its electrical parameters for the CANL, CANH, RX and
TX pins are compatible with ISO 11898 specification (IS0 11898: 1993(E)). The control of the CAN physical interface operation
is accomplished through the SPI. CAN modes are independent of the SBC operation modes.
The device can wake-up from a CAN message if the CAN wake-up is enabled. Please refer to the CAN module description
for detail of wake-up detection.
RST
WD
VDD1
SPI
SPI CS
Watchdog Timeout
Watchdog
Period
WD Clear
MODE 1
RST
MODE 2
Register
Addressed
WD
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