RPIXP2800BC Intel, RPIXP2800BC Datasheet - Page 55
RPIXP2800BC
Manufacturer Part Number
RPIXP2800BC
Description
Manufacturer
Intel
Datasheet
1.RPIXP2800BC.pdf
(154 pages)
Specifications of RPIXP2800BC
Operating Supply Voltage (typ)
1.3/1.5/2.5/3.3V
Operating Supply Voltage (max)
1.575/2.7/3.465V
Operating Supply Voltage (min)
1.235/2.3/3.135V
Mounting
Surface Mount
Operating Temperature (max)
70C
Operating Temperature (min)
0C
Operating Temperature Classification
Commercial
Lead Free Status / Rohs Status
Not Compliant
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Table 14.
Table 15.
Table 16.
Hardware Design Guide
SRAM Size
512K x 18
1M x 18
2M x 18
4M x 18
Note: External decoding may require external pipeline registers to account for the decode time,
SRAM Controller Configurations
Each channel can be expanded by depth, according to the number of port-enables available. If
external decoding is used, then the number of SRAMs used is not limited by the number of port
enables generated by the SRAM controller.
depending on the desired frequency.
Table 15
QDR Address/RPE/WPE Mapping
Table 16
they use more port-enables than the SRAM controller can supply directly.
Total Memory per Channel (Sheet 1 of 2)
512K x 18 - 1 Mbyte
1Mb x 18 - 2 Mbytes
2Mb x 18 - 4 Mbytes
4Mb x 18 - 8 Mbytes
8Mb x 18 - 16 Mbytes
16Mb x 18 - 32 Mbytes
32Mb x 18 - 64 Mbytes
Configuration/Size
Configuration
512K x 18
2 Mbytes
4 Mbytes
8 Mbytes
16M x 18
32M x 18
1 Mbyte
1M x 18
2M x 18
4M x 18
8M x 18
SRAM
SRAM
1
lists the QDR Address and Read Port Enable (RPE)/Write Port Enable (WPE) mapping.
shows maximum SRAM system sizes. Shaded entries require external decoding, because
16 Mbytes
2 Mbytes
4 Mbytes
8 Mbytes
2
SRAM_CONTROL
[SRAM_SIZE][9:7]
SRAM Size
16 Mbytes
32 Mbytes
64 Mbytes
2 Mbytes
4 Mbytes
8 Mbytes
1 Mbyte
12 Mbytes
24 Mbytes
3 Mbytes
6 Mbytes
000
001
010
011
100
101
110
3
Number of SRAMs on Channel
16 Mbytes
32 Mbytes
4 Mbytes
8 Mbytes
Addresses Needed
SRAM_CONTROL
[PORT_CTL][5:4]
to Index SRAM
4
17:0
18:0
19:0
20:0
21:0
22:0
23:0
11
11
11
10
10
00
00
10 Mbytes
20 Mbytes
64 Mbytes
5 Mbytes
5
QDR_ADDR[23:22] QDR_ADDR[21:20]
QDR_ADDR[23:22] N/A
N/A
N/A
QDR_ADDR[23:22] QDR_ADDR[21:20]
QDR_ADDR[23:22] QDR_ADDR[21:20]
QDR_ADDR[23:22] N/A
RPE[2]/WPE[2]
Addresses Used
as Port-enables
12 Mbytes
24 Mbytes
6 Mbytes
IXP28XX Network Processor
23:22, 21:20
23:22, 21:20
23:22, 21:20
NA
23:22
23:22
None
None
6
14 Mbytes
28 Mbytes
7 Mbytes
NA
N/A
N/A
7
Port-select Pairs
Total Number of
RPE[3]/WPE[3]
Available
QDR SRAM
16 Mbytes
32 Mbytes
8 Mbytes
4
4
4
3
3
2
1
NA
8
55
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