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| 型号： | KIT33689DWBEVB |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 15/31页 |
| 文件大小： | 0K |
| 描述： | KIT FOR 33689 SBC WITH LIN |
| 标准包装： | 1 |
| 主要目的： | LIN 接口 |
| 已用 IC / 零件： | MC33689 |
| 相关产品： | MC33689DDWBR2CT-ND - IC SYSTEM BASE W/LIN 32-SOIC MC33689DWBR2-ND - IC SYSTEM BASE W/LIN 32-SOIC MC33689DWB-ND - IC SYSTEM BASE W/LIN 32-SOIC MC33689DDWBR2TR-ND - IC SYSTEM BASE W/LIN 32-SOIC MC33689DDWB-ND - IC SYSTEM BASE W/LIN 32-SOIC |
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Analog Integrated Circuit Device Data
22
Freescale Semiconductor
33689
FUNCTIONAL DESCRIPTION
FUNCTIONAL DEVICE OPERATION
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
As described below and depicted in Figure 1 below and
Normal, Sleep, and Stop. Operational modes are controlled
by MODE1 and MODE2 bits in the SPI Register (refer to
Logic Commands and Registers on page 24). In additional,
there are two transitional modes: Reset and Normal Request.
RESET MODE
At power up, the 33689 switches automatically to Reset
Mode for 1 ms if VDD goes high. If VDD stays low, after
150 ms the 33689 goes in Sleep Mode.
NORMAL REQUEST MODE
Before entering in Normal Request Mode, the 33689 stays
for 1 ms in Reset Mode. In this mode, the LIN bus can
transmit and receive information.
Figure 1. 33689 Modes State Diagram
Power
Reset
Stop
Normal
Sleep
VDD HIGH & Reset Counter (1.0 ms)
Expired & Watchdog Selected
33689
Power
-Up
VDD LOW OR
(Normal Request
Timeout Occurs
[150 ms] & Watchdog
Selected)
Wake-
U
p
&
W
a
tc
h-
dog
S
e
lected
Stop
Comman
d
Sleep
Command
Wake-Up
VDD LOW
W
a
tchdog
T
rigger
VDD HIGH & Reset Counter (1.0 ms) Expired & Watchdog Not Selected
VDD LOW OR (Watchdog
Fail & Watchdog Selected)
Legend
Watchdog Selected: External resistor between WDC pin and GND or WDC pin open.
Watchdog Not Selected: WDC pin connected to GND.
Watchdog Fail: Watchdog trigger occurs in closed window or no SPI Watchdog trigger command.
Stop Command: SPI stop command.
Sleep Command: SPI sleep request followed by SPI sleep command.
Wake-Up: L1 or L2 state change or LIN bus wake-up or CS rising edge.
VDD LOW (150 ms) Expired & VSUV Bit = Logic [0]
Wak
e
-U
p
&
W
a
tchdog
Not
Selec
ted
Down
Normal
Request
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