User`s manual

Functional Description 19
AMC-1000
3.4.3 Serial Port
One PC-compatible serial RS-232 and is fully 16C550 compatible
when set to RS-232 mode. The COM1 signal is routed to a RJ45
port on front panel of the AMC-1000. This port can also be used as
a Module Management Controller (MMC) debug port (see “COM1
Mode Switch Settings (SWX4)” on page 27). The serial port
includes a complete set of handshaking and modem control sig-
nals. Data transfer rates up to 115.2 kB/s are supported.
3.4.4 Serial ATA Interfaces
The AMC-1000 supports two SATA ports on AMC Connector Ports
2 & 3. Additionally, four Serial ATA ports are routed to rear I/O
ports 14-15, 17-18 for expansion. All SATA ports can be used
simultaneously.
3.4.5 Timer
The AMC-1000 is equipped with the following timers:
Real-Time Clock
The IICH contains real-time clock with 256-byte of battery-
backed RAM.
The real-time clock performs timekeeping functions and
includes 256 bytes of general purpose battery-backed CMOS
RAM. Features include an alarm function, programmable peri-
odic interrupt and a 100-year calendar. All battery-backed
CMOS RAM data remains stored in an additional EEPROM.
This prevents data loss in case the AMC-1000 is operated with-
out battery.
Counter/Timer
Three 8254-style counter/timers are included on the AMC-1000
as defined for the PC/AT (System Timer, Refresh Request,
Speaker Tone Output).
In addition to the three 8254-style counters, the IICH includes
three High Precision Event Timers (HPET) that may be used by
the operating system. They are implemented as a single
counter each with its own comparator and value register.
They support One-shot and periodic interrupts.