ELANSC310 AMD [Advanced Micro Devices], ELANSC310 Datasheet - Page 88

• Manufacturer Part Number: ELANSC310
• Description: Single-Chip, 32-Bit, PC/AT Microcontroller
• Manufacturer: AMD [Advanced Micro Devices]

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
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 ÉlanSC310 microcontroller should be observed as follows:
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.
88
Symbol
component values used, board layout, and power supply noise. For more information, see “Crystal Specifications” on page
84.
– VCC
– All VCC clamp sources (VCC, VMEM, VSYS, VCC5, and AVCC)
– All VCCIO sources (VCC5, VMEM, VSYS, VCC1, VSYS2, and AVCC)
t1
t2
t3
t4
t5
t6
t7
All VCC valid to RESIN and IORESET inactive
RESIN and IORESET inactive to RSTDRV inactive
IORESET active to RSTDRV active
VCC5, VSYS2, VCC1, VSYS hold time from IORESET
VCC5 hold time from VSYS2, VCC1, and VSYS inactive
VSYS2, VCC1, and VSYS valid delay from VCC5
VSYS2, VCC1, VSYS, and optionally VMEM valid to
IORESET inactive
active
Parameter Description
Table 45. Power-Up Sequencing (See Figures 32–35)
Élan™SC310 Microcontroller Data Sheet
P R E L I M I N A R Y
Notes
1, 2
2, 3
Min
300
0
0
5
5
0
Preliminary
Typ
1
Max
Unit
ns
ns
ns
s
s
s
s