SUPPLEMENTAL APPLICATION NOTES T1: Is dependent o" />
參數(shù)資料
型號(hào)： MCZ33989EGR2
廠商： Freescale Semiconductor
文件頁(yè)數(shù)： 43/72頁(yè)
文件大小： 0K
描述： IC SYSTEM BASIS CHIP CAN 28-SOIC
標(biāo)準(zhǔn)包裝： 1,000
系列： *
應(yīng)用： *
接口： *
電源電壓： *
封裝/外殼： 28-SOIC（0.295"，7.50mm 寬）
供應(yīng)商設(shè)備封裝： 28-SOIC W
包裝： 帶卷 (TR)
安裝類型： 表面貼裝
Analog Integrated Circuit Device Data
48
Freescale Semiconductor
33989
TYPICAL APPLICATIONS
SUPPLEMENTAL APPLICATION NOTES
T1: Is dependent on the selected cyclic sense timing in the TIM2 register (5.0 to 400 ms). LX is sampled
10 s before the end of cyclic sense on time. If the LX correct wake-up level happens just after the sample point, the wake-
up will be detected at the next HS1 activation and a complete period is lost.
T2: It is the same time as LX to VDD1 turn on: typ 100 s
T3 & T4: same as page 42
The total time is 11.5 ms (for a cyclic sense total time of 5.0 ms) in this example.
WAKE-UP TIMING: STOP MODE
The following paragraphs describe the wake-up events from stop mode, and the sequence of the signals at the SBC level. The
wake-up time described is the time from the wake-up event to the SBC INT pin. The wake-up time is the sum of several timings:
wake-up signal detection, the INT pulse, and a minimum delay between INT and SBC ready to operate. At the end of the wake-
up time, the SBC is ready to operate, however the MCU might have already been in a restart operation.
LX Wake-up
Below is the case where the SBC is in stop mode and is awakened by an LX positive edge
T1(L0 high level to INT pulse): typ 100 s.
The total time is 133 s in this case.
Figure 29. Lx Wake-up
CAN Wake-up
The case below describes the signal for CAN wake-up. Refer to page 53 for more details on CAN wake-up signals and the
TCAN analysis.
Figure 30. CAN Wake-up
TCAN
: refer to page 53 for more details.
T1: Third pulse on CAN to INT pulse: typ 80 s.
The total time is 113 s in this case.
CS Wake-up
The figure below describes the wake up from a CS signal transition, while the SBC is in Stop mode.
L0
INT
SBC ready to accept SPI command.
t1
Wake-up signalled to MCU.
tINT + tS-1STSPI (33μs max)
CAN
INT
t1
SBC ready to accept SPI command.
Wake-up signalled to MCU.
tCAN
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