User's Manual

Turbo PMAC2 PCI Hardware Reference Manual
Introduction 3
Option 8: High-Accuracy Clock Crystal
The Turbo PMAC2 PCI has a clock crystal (component Y1) of nominal frequency 19.6608 MHz (~20
MHz). The standard crystal’s accuracy specification is +/-100 ppm.
• Option 8A provides a nominal 19.6608 MHz crystal with a +/-15 ppm accuracy specification.
Option 9: Serial Port Configuration
The Turbo PMAC2 PCI comes standard with a single serial port that can use either RS-232 or RS-422
transceivers. Optionally, a second independent serial port can be added.
•
Option 9T adds an auxiliary RS-232 port on the CPU piggyback board. The key components added
are IC U22 and connector J8 on the CPU board.
Option 10: Firmware Version Specification
Normally the Turbo PMAC2 PCI is provided with the newest released firmware version. A label on the
U10 flash memory IC on the CPU board shows the firmware version loaded at the factory.
• Option 10 provides for a user-specified firmware version.
Option 12: Analog-to-Digital Converters
Option 12 permits the installation of 8 or 16 channels of on-board multiplexed analog-to-digital
converters. One or two of these converters are read every phase interrupt. The analog inputs are not
optically isolated, and each can have a 0 – 5V input range, or a +/-2.5V input range, individually
selectable.
• Option 12 provides an 8-channel 12-bit A/D converter. The key components on the board are U28
and connector J1.
• Option 12A provides an additional 8-channel 12-bit A/D converter. The key component on the board
is U29.
Option 16: Battery-Backed Parameter Memory
The contents of the standard memory are not retained through a power-down or reset unless they have
been saved to flash memory first. Option 16 provides supplemental battery-backed RAM for real-time
parameter storage that is ideal for holding machine state parameters in case of an unexpected powerdown.
The battery is located at component BT1.
• Option 16A provides a 32k x 24 bank of battery-backed parameter RAM in components U17, U18,
and U19 on the CPU board, fitting in the smaller footprint for those locations.
• Option 16B provides a 128k x 24 bank of battery-backed parameter RAM in components U17, U18,
and U19 on the CPU board, filling the full footprint for those locations.
Option 18: Identification Number and Real Time Clock/Calendar Module
Option 18 provides a module at location U5 on the CPU board that contains an electronic identification
number, and possibly a real-time clock/calendar.
• Option 18A provides an electronic identification number module.
• Option 18B provides an electronic identification number module with a real-time clock and calendar.
The year representation in the calendar is a 4-digit value, so there are no Year 2000 problems.