Chapter 3: Serial Configuration Devices (EPCS1, EPCS4, EPCS16, EPCS64, and EPCS128) Data Sheet
Serial Configuration Device Memory Access
3–7
Serial Configuration Device Memory Access
This section describes the serial configuration device’s memory array organization
and operation codes. Timing specifications for the memory are provided in the
section.
Memory Array Organization
provides details about the memory array organization in EPCS128, EPCS64,
EPCS16, EPCS4, and EPCS1.
Table 3–2.
Memory Array Organization in Serial Configuration Devices
Details
Bytes (bits)
Number of sectors
Bytes (bits) per
sector
Pages per sector
Total number of
pages
Bytes per page
EPCS128
16,777,216 bytes
(128 Mbits)
64
262,144 bytes
(2 Mbits)
1,024
65,536
256 bytes
EPCS64
8,388,608 bytes
(64 Mbits)
128
65,536 bytes
(512 Kbits)
256
32,768
256 bytes
EPCS16
2,097,152 bytes
(16 Mbits)
32
65,536 bytes
(512 Kbits)
256
8,192
256 bytes
EPCS4
524,288 bytes
(4 Mbits)
8
65,536 bytes
(512 Kbits)
256
2,048
256 bytes
EPCS1
131,072 bytes
(1 Mbit)
4
32,768 bytes
(256 Kbits)
128
512
256 bytes
through
list the address range for each sector in EPCS128, EPCS64,
EPCS16, EPCS4, and EPCS1.
Table 3–3.
Address Range for Sectors in EPCS128 (Part 1 of 3)
Address Range (Byte Addresses in HEX)
Sector
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
Start
H'FC0000
H'F80000
H'F40000
H'F00000
H'EC0000
H'E80000
H'E40000
H'E00000
H'DC0000
H'D80000
H'D40000
H'D00000
H'CC0000
H'C80000
H'C40000
H'C00000
End
H'FFFFFF
H'FBFFFF
H'F7FFFF
H'F3FFFF
H'EFFFFF
H'EBFFFF
H'E7FFFF
H'E3FFFF
H'DFFFFF
H'DBFFFF
H'D7FFFF
H'D3FFFF
H'CFFFFF
H'CBFFFF
H'C7FFFF
H'C3FFFF
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