ELANSC310 AMD [Advanced Micro Devices], ELANSC310 Datasheet - Page 21

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

PIN STATE TABLES
The Pin State tables beginning on page 22 are grouped
by function based on their primary function when the
ÉlanSC310 microcontroller is configured at reset for
the internal LCD Controller mode (NAME1). The Pin
State tables also show the I/O type and reset state for
those pins that have been configured at reset for either
Local Bus mode or Maximum ISA Bus mode.
Pin Characteristics
The following information clarifies the meaning of the
Pin State tables beginning on page 22:
The letters in the I/O Type column of Tables 2–10 mean
the following:
The Term column refers to internal termination. The
letters in this column of Tables 2–10 mean the follow-
ing:
The symbols (letters) in the Drive Type column specify
the drive capability of output pins. These specifications
can be found in the DC Characteristics section begin-
ning on page 70 of this document. For a more complete
description of I/O Drive Types, see “Derating Curves”
on page 73 and Table 42 on page 73.
The Clock Off column describes the logic level of the
I/O pins while the ÉlanSC310 microcontroller is in any
of the power management modes where the CPU clock
is stopped, and power is still applied to both the VCCIO
and VCC clamp supply pins associated with that I/O
pin.
I
O – Output
STI – Schmitt Trigger Input
B
A
PD – Pull-down resistor
PU – Pull-up resistor
– Input
– Bidirectional
– Analog
Élan™SC310 Microcontroller Data Sheet
P R E L I M I N A R Y
The Reset State column lists the I/O pin voltage level
when all of the VCC pins are stable and the RESIN
input is active. The level of the VCC pins correlating to
this data is shown in Table 1.
The VCCIO column refers to the voltage supply pin on
the ÉlanSC310 microcontroller that is directly con-
nected to the output driver for the specified signal pin.
The VCC Clamp column refers to the voltage supply
pin on the ÉlanSC310 microcontroller that is directly
connected to the ESD protection diode (cathode) for
the specified signal pin. Any pin with a 5-V VCC Clamp
is a “5-V safe” input.
The Spec. Load (specification load) column is used to
determine derated AC timing. See of “Derating Curves”
on page 73 of this data sheet.
VCC
AVCC
VCC5
VSYS2
VSYS
VMEM
VCC1
Pin Name
Table 1. I/O Pin Voltage Level
Bus (V)
Local
3.3
3.3
5.0
3.3
5.0
3.3
3.3
Maximum
ISA (V)
3.3
3.3
5.0
5.0
5.0
3.3
3.3
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