user manual

MVME177 Functional Description

4-11

❏ Minutes

❏ Hours

❏ Day

❏ Date

❏ Month

❏ Year

in BCD 24-hour format. Corrections for 28-, 29- (leap year), and

30-day months are automatically made. No interrupts are

generated by the clock. The DS1643/MK48T08 is an 8 bit device;

however, the interface provided by the PCCchip2 supports:

❏ 8 bit

❏ 16 bit, and

❏ 32 bit accesses to the DS1643/MK48T08

Refer to the PCCchip2 in the Single Board Computers Programmer's

Reference Guide and to the DS1643/MK48T08 data sheet for detailed

programming information.

VMEbus Interface

The local bus to VMEbus interface, the VMEbus to local bus

interface, and the local-VMEbus DMA controller functions on the

MVME177 are provided by the VMEchip2. The VMEchip2 can also

provide the VMEbus system controller functions. Refer to the

VMEchip2 in the Single Board Computers Programmer's Reference

Guide for detailed programming information.

I/O Interfaces

The MVME177 provides onboard I/O for many system

applications. The I/O functions include:

❏ Serial ports