EPCS4SI8 Altera, EPCS4SI8 Datasheet - Page 21

• Manufacturer Part Number: EPCS4SI8
• Description: IC CONFIG DEVICE 4MBIT 8-SOIC
• Manufacturer: Altera
• Series: EPCSr

Specifications of EPCS4SI8

• Programmable Type: In System Programmable
• Memory Size: 4Mb
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 544-1243-5

Chapter 3: Serial Configuration Devices (EPCS1, EPCS4, EPCS16, EPCS64, and EPCS128) Data Sheet
Serial Configuration Device Memory Access
© December 2009
Altera Corporation
Fast Read Operation
The device is first selected by driving nCS low. The fast read instruction code is
followed by a 3-byte address (A23-A0) and a dummy byte, each bit being latched-in
during the rising edge of DCLK. Then the memory contents, at that address, is shifted
out on DATA, each bit being shifted out, at a maximum frequency of 40 MHz, during
the falling edge of DCLK.
The instruction sequence is shown in
The first byte addressed can be at any location. The address is automatically
incremented to the next higher address after each byte of data is shifted out. The
whole memory can, therefore, be read with a single fast read instruction. When the
highest address is reached, the address counter rolls over to 000000h, allowing the
read sequence to be continued indefinitely.
The fast read instruction is terminated by driving nCS high at any time during data
output. Any fast read instruction is rejected during the Erase, Program, or Write
operations without any effect on the operation that is in progress .
Figure 3–12. FAST_READ Operation Timing Diagram
Note to
(1) Address bit A[23] is a don't-care bit in EPCS64. Address bits A[23..21] are don't-care bits in EPCS16. Address
bits A[23..19] are don't-care bits in EPCS4. Address bits A[23..17] are don't-care bits in the EPCS1.
DCLK
DCLK
ASDI
DATA
ASDI
DATA
nCS
nCS
Figure
7
32
3–12:
6
33
5
34
0
Dummy Byte
4
35
1
3
36
2
High Impedance
Operation Code
2
37
3
1
38
4
0
39
5
MSB
7
40
6
6
41
7
Figure
MSB
5
23
42
8
DATA Out 1
4
22
43
9
3
21
44
3–12.
10
24-Bit Address (1)
2
45
Configuration Handbook (Complete Two-Volume Set)
1
46
0
47
3
MSB
28
7
2
29
6
1
30
5
0
DATA Out 2
31
4
3
2
1
0
MSB
7
3–21