Dma Engines; I 2 C Interface; Serial Eeprom; Real-Time Clock - GE IMP2B Hardware Reference Manual

3.13 DMA Engines

The MV64560 provides six independent DMA engines. These can be used to transfer
blocks of data between PCI interfaces, memory and Flash devices without impacting
on CPU performance. Two of these are XOR DMA engines, which may be used for
Memory Initialization, CRC-32 calculation or ECC.
3.14 I C Interface
2
The following devices are available on the I
Table 3-8 I
Device
LM92
ADT7461
AT24C64A
PCF8563
DS1682

3.14.1 Serial EEPROM

An 8 KByte Serial EEPROM is provided for non-volatile data storage. The device is
write-protected by default, and can be write-enabled by fitting the
EEPROM Write Enable Link (P5 3-4)
Control Register

3.14.2 Real-Time Clock

A PCF8563 provides real-time clock functions. The device reports year (2 digit),
month, date, hours, minutes and seconds. It has leap year compensation up to 2100
and it also features an alarm capability. Battery back-up is not supported.
For more details see the device data sheet.
26 IMP2B 3U cPCI Single Board Computer
2
C Device Addresses
I C Address Function
2
0x90 Board Temperature Sensor
0x98 CPU Temperature Sensor
0xA0 8 KByte Serial EEPROM
0xA2 Real-Time Clock
0xD6 Elapsed Time Indicator
1.
NOTE
Integrity of EEPROM data cannot be guaranteed if a hard reset occurs during an EEPROM write cycle.
LINK
http://www.semiconductors.philips.com/cgi-bin/pldb/pip/PCF8563T/F4.html
C interface from the MV64560:
2
and by clearing the appropriate bit in the EPLD
NVRAM/Serial
Publication No. IMP2B-0HH/5