ELANSC400-66AC AMD (ADVANCED MICRO DEVICES), ELANSC400-66AC Datasheet - Page 83

• Manufacturer Part Number: ELANSC400-66AC
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of ELANSC400-66AC

• Cpu Family: Elan
• Device Core Size: 16/32Bit
• Frequency (max): 66MHz
• Interface Type: ISA
• Program Memory Type: ROMLess
• Program Memory Size: Not Required
• Number Of Timers - General Purpose: 1
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 3V
• Instruction Set Architecture: CISC
• Operating Temp Range: 0C to 95C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 292
• Package Type: BGA
• Lead Free Status / Rohs Status: Not Compliant

Clock Specifications
The specifications for the external components re-
quired to implement the four PLL loop filters are shown
in Table 28 on page 84.
Table 29 on page 84 lists the electrical specifications
for the analog V
The on-chip crystal oscillator circuit supports most
g e n e r i c 3 2 . 7 6 8 - k H z c r y s t a l s a s l o n g a s t h e
specification for the crystals meet the electrical
parameters listed in Table 30 on page 84.
The worst-case start-up time required for the PLLs is
shown in Table 31 on page 84.
The PLL jitter specification is listed in Table 32 on
page 85.
32 kHz
Notes:
1. These timings apply only when powering down the chip while leaving only the RTC powered.
2. Applies to all V
3. Guarantees at least one rising edge after reset before 2.7 volts is reached.
RESET
V
CC
CC
CC
(VCCA) pin.
except for the V
Figure 12. Timing Diagram for RTC-On Power-Down Sequence
Élan™SC400 and ÉlanSC410 Microcontrollers Data Sheet
CC
_RTC, which is left on for this mode.
Programmable Interval Timer (PIT)
The ÉlanSC400 and ÉlanSC410 microcontrollers are
equipped with a Programmable Interval Timer (PIT)
that is software-compatible with PC/AT 8254 system
timers. Historically, the clock source for this timer has
been 1.19318 MHz. However, the internal PIT clock
source is 1.1892 MHz. The user has two options:
For more details on this feature, refer to the subsection
on configuring Timer Channel 0 in the programmable
i n t e r v a l ti m e r s e c t i o n o f t h e É l a n S C4 0 0 a n d
ÉlanSC410 Microcontrollers User’s Manual , order
#21030.
Use the internal PIT clock source (1.1892 MHz),
which can adversely affect the Legacy software that
depends on the 1.19318-MHz frequency.
Drive an external 1.19318-MHz clock onto the
CLK_IO pin and program this signal to be the
source of the PIT clock.
33 s
(min)
3.3 V
2.7 V
83