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参数资料
| 型号： | MC33912G5AC |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 36/95页 |
| 文件大小： | 0K |
| 描述： | IC SYSTEM BASIS CHIP 32LQFP |
| 标准包装： | 250 |
| 应用： | 系统基础芯片 |
| 电流 - 电源： | 4.5mA |
| 电源电压： | 5.5 V ~ 27 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-LQFP |
| 供应商设备封装： | 32-LQFP（7x7） |
| 包装： | 托盘 |
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MC33912G5AC / MC34912G5AC
FUNCTIONAL DEVICE OPERATIONS
OPERATIONAL MODES
LIN Pin
The LIN pin offers a high susceptibility immunity level from
external disturbance, guaranteeing communication during
external disturbance.
WAKE-UP
MODULE
LIN
Wake-up
MOD1:2
LSR0:1
J2602
RXONLY
RXSHORT
LIN DRIVER
Slope and Slew Rate Control
Over-temperature Shutdown (interrupt maskable)
VS1
TXDOM
LINOT
30 K
LIN
TXD
SLOPE
WAKE-UP
CONTROL
LGND
FILTER
RXD
RECEIVER
Figure 19. LIN Interface
Slew Rate Selection
The slew rate can be selected for optimized operation at 10.4
and 20 kBit/s as well as a fast baud rate for test and
programming. The slew rate can be adapted with the bits
LSR1:0 in the LIN Control Register (LINCR). The initial slew
rate is optimized for 20 kBit/s.
J2602 Conformance
To be compliant with the SAE J2602-2 specification, the
J2602 feature has to be enabled in the LINCR Register (bit
DIS_J2602 sets to 0). The LIN transmitter is disabled in case
of a V SUP under-voltage condition occurs and TXD is in
Recessive State: the LIN bus goes in Recessive State and
RXD goes high. The LIN transmitter is not disabled if TXD is
in Dominant State. A deglitcher on Vsup (t J2602_DEG ) is
implemented to avoid false switching.
If the (DIS_J2602) bit is set to 1, the J2602 feature is disabled
and the communication TXD-LIN-RXD works for V SUP down
to 4.6 V (typical value) and then the communication is
interrupted.
The (DIS_J2602) bit is set per default to 0.
Over-temperature Shutdown (LIN Interrupt)
The output low side FET is protected against over-
temperature conditions. In case of an over-temperature
condition, the transmitter will be shut down and the LINOT bit
in the LIN Status Register (LINSR) is set.
If the LINM bit is set in the Interrupt Mask Register (IMR), an
Interrupt IRQ will be generated.
The transmitter is automatically re-enabled once the
condition is gone and TXD is high.
RXD Short-circuit Detection (LIN Interrupt)
The LIN transceiver has a short-circuit detection for the RXD
output pin. If the device transmits and in case of a short-
33912
Analog Integrated Circuit Device Data ?
36
Freescale Semiconductor
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