參數(shù)資料
型號: ELANSC410
英文描述: Single Synchronous Buck Pulse-Width Modulation (PWM) Controller; Temperature Range: 0&degC to 70°C; Package: 16-QFN
中文描述: ElanSC410 - ElanSC410框圖
文件頁數(shù): 107/119頁
文件大?。?/td> 1167K
代理商: ELANSC410
88
lanSC310 Microcontroller Data Sheet
PREL IMINARY
AC Switching Characteristics over Commercial Operating Ranges
Notes:
1. This parameter is dependent on the 32 kHz oscillator start-up time. The oscillator start-up time is dependent on the external
component values used, board layout, and power supply noise. For more information, see “Crystal Specifications” on page
2. RESIN remains inactive during Micro Power Off mode and Micro Power Off mode exit.
3. The pulse width of RSTDRV is adjustable based on PLL start-up timing. See “Loop Filters” on page 86 for more information.
Voltage sequencing on power-up for the lanSC310 microcontroller should be observed as follows:
–VCC
– All VCC clamp sources (VCC, VMEM, VSYS, VCC5, and AVCC)
– All VCCIO sources (VCC5, VMEM, VSYS, VCC1, VSYS2, and AVCC)
The reverse is true when powering down. For any particular I/O pin, the VCCIO may come up simultaneously with the VCC clamp,
but should never proceed the VCC clamp. Refer to the Pin Characteristics table (page 21) for detailed I/O information.
Table 45.
Power-Up Sequencing (See Figures 32–35)
Symbol
Parameter Description
Notes
Preliminary
Unit
Min
Typ
Max
t1
All VCC valid to RESIN and IORESET inactive
1, 2
1
s
t2
RESIN and IORESET inactive to RSTDRV inactive
2, 3
300
s
t3
IORESET active to RSTDRV active
0
ns
t4
VSYS2, VCC1, and VSYS valid delay from VCC5
0
ns
t5
VSYS2, VCC1, VSYS, and optionally VMEM valid to
IORESET inactive
5
s
t6
VCC5, VSYS2, VCC1, VSYS hold time from IORESET
active
5
s
t7
VCC5 hold time from VSYS2, VCC1, and VSYS inactive
0
ns
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