ELANSC310 AMD [Advanced Micro Devices], ELANSC310 Datasheet - Page 12

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

ÉLANSC310 MICROCONTROLLER PIN DESIGNATIONS
This section, beginning with the Connection Diagram
on the preceding page, identifies the pins of the
ÉlanSC310 microcontroller and lists the signals associ-
ated with each pin. Tables 2–10, beginning on page 22,
group these signals according to function. The table
beginning on page 13 lists the pins sorted by pin num-
ber; the table beginning on page 15 lists the pins sorted
by pin name along with the corresponding pin number,
functional grouping, Pin State table number, and the
page number where a description of the pin is located.
The Signal Name column in the pin designation table
(sorted by pin number), and in Tables 2–10, is decoded
as follows:
NAME1 / NAME2 [NAME3] (NAME4)
NAME1 - This is the pin function when the ÉlanSC310
microcontroller has been configured, at reset, for the
Local Bus mode of operation. If the pin only has one
function regardless of the mode, NAME1 is the only
name given.
NAME2 - This is the secondary pin function (by default)
when the ÉlanSC310 microcontroller has been config-
ured, at reset, for the Local Bus mode of operation. If
the pin always has two functions regardless of the
mode, NAME1 followed by NAME2 are the only names
given.
12
Élan™SC310 Microcontroller Data Sheet
P R E L I M I N A R Y
NAME3 - This is a tertiary pin function that must be en-
abled specifically by firmware. As an example, for pins
DACK2[TCK], DRQ2[TDO], AEN[TDI], and TC[TMS],
the NAME3 function is selected by the JTAGEN pin
being asserted High (JTAG ENABLE).
NAME4 - Designates the pin function when the
ÉlanSC310 microcontroller has been configured, at re-
set, for the Maximum ISA mode of operation.
RSVD - Pins marked with this designator are required
to remain unconnected.
PULLUP - Needs external pull-up resistor.
PULLDN - Needs external pull-down resistor.
The Signal Name column in the pin designation table
(sorted by pin name), beginning on page 13, contains
an alphabetical listing of all pin names, followed by
their corresponding alternate pin names in the applica-
ble format from those listed here:
NAME1 / NAME2 [NAME3] (NAME4 / NAME5)
NAME2 / NAME1 [NAME3] (NAME4 / NAME5)
[NAME3] (NAME4 / NAME5) NAME1 / NAME2
(NAME4 / NAME5) NAME1 / NAME2 [NAME3]
(NAME5 / NAME4) NAME1 / NAME2 [NAME3]
For more information about how pins are shared and
which functions are available in each bus mode, see
“Alternate Pin Functions” on page 59