Software reference 5, 1 dram, 2 components on the peripheral bus – Intel IQ80219 User Manual
Page 71: Software reference, Dram, Components on the peripheral bus, Ddr memory bias voltage minimum/maximum values
71
Software Reference
5
5.1
DRAM
For DDR SDRAM Sizes and Configurations, see section 7.2.2.1, table 139 of theIntel
®
80219
General Purpose PCI Processor Developer’s Manual.
provides DDR SDRAM Address
Register Definitions, while this sections also contains multiple examples of Address Register
Programming.
See the Intel
®
80219 General Purpose PCI Processor Design Guide, section 7.1, table 16 for
supported DDR and SDRAM configurations.
The Intel
®
80219 general purpose PCI processor (80219) supports 2.5 V DDR memory.
lists the minimum/maximum values for the DDR memory bias voltages:
For all registers relating to DRAM and other MCU related registers, see section 7.6, Table 149 of the
Intel
®
80219 General Purpose PCI Processor Developer’s Manual.
5.2
Components on the Peripheral Bus
The 80219 has a peripheral bus which contains the following peripheral devices:
•
Flash ROM
•
UART
•
Rotary Switch
•
Hex Display
Peripheral memory-Mapped Register Locations for the Peripheral Bus Interface Unit can be found in
the Intel
®
80219 General Purpose PCI Processor Developer’s Manual, Section 7.5, Table 298, sheet
7 of 12. The appropriate Base address and Limit registers must be set for each of the six chip enables
(PCE0-5). Each peripheral and its corresponding PCE# are described in this section.
All registers associated with the PBI can be found in the Intel
®
80219 General Purpose PCI
Processor Developer’s Manual, section 8.6, table 128.
Table 88.
DDR Memory Bias Voltage Minimum/Maximum Values
Symbol
Parameter
Voltages
Units
Minimum
Maximum
V
CC25
2.5 V Supply Voltage
2.3
2.7
V
V
REF
Memory I/O Reference Voltage
1.15
1.35
V
V
TT
DDR Memory Termination Voltage
V
REF
- 0.04
V
REF
+ 0.04
V