am79c961 Advanced Micro Devices, am79c961 Datasheet - Page 172

• Manufacturer Part Number: am79c961
• Description: Pcnettm-isa Jumperless Single-chip Ethernet Controller For Isa
• Manufacturer: Advanced Micro Devices

Some Characteristics of the
XXC56 Serial EEPROMs
SWITCHING CHARACTERISTICS of a TYPICAL XXC56 SERIAL EEPROM INTERFACE
Applicable over recommended operating range from TA = –40∞C to +85∞C, VCC = +1.8 V to
+5.5 V, CL = 1 TTL Gate and 100 pF (unless otherwise noted)
Notes:
1. The SK frequency specifies a minimum SK clock period of 2 m s, therefore in an SK clock cycle t SKH + t SKL must be greater than
2. CS must be brought low for a minimum of 500 ns (t CS ) between consecutive instruction cycles.
INSTRUCTION SET FOR THE XXC56 SERIES OF EEPROMs
1-646
Parameter
Symbol
Instruction
tSKH
tCSS
tCSH
tSKL
tPD1
tPD0
tDIS
tDIH
or equal to 2 m s. For example, if the t SKL = 500 ns then the minimum t SKH = 1.5 m s in order to meet the SK frequency
specification.
tWP
fSK
tCS
tSV
tDF
READ
EWEN
ERASE
WRITE
ERAL
WRAL
EWDS
APPENDIX F
SK Clock Frequency
SK High Time
SK Low Time
Minimum CS Low Time
CS Setup Time
DI Setup Time
CS Hold Time
DI Hold Time
Output Delay to ‘1’
Output Delay to ‘0’
CS to Status Valid
CS to DO in High Impedance
Write Cycle Time
Endurance
Parameter Description
SB
1
1
1
1
1
1
1
Code
10
00
11
01
00
00
00
Op
11XXXXXXX
10XXXXXXX
01XXXXXXX
00XXXXXXX
A8–A0
A8–A0
A0–A0
x8
Address
(Note 1)
(Note 1)
(Note 2)
Relative to SK
Relative to SK
Relative to SK
Relative to SK
AC Test
AC Test
AC Test
AC Test; CS = VIL
Number of Data Changes
per Bit
11XXXXXX
10XXXXXX
01XXXXXX
00XXXXXX
A7–A0
A7–A0
A7–A0
Test Conditions
x16
Am79C961
D7–D0
D7–D0
x8
Data
D15–D0
D15–D0
x16
100,000
Typical
Min
500
500
500
100
200
200
0
0
memory, at specified address
programming modes
Valid only at VCC = 4.5 V to 5.5 V
Valid when VCC = 5.0 V ± 10%
and Disable Register cleared
instructions
Reads data stored in
Write enable must precede all
Erases memory location An–A0
Writes memory location An–A0
Erases all memory locations.
Writes all memory locations.
Disables all programming
Comments
1000
1000
1000
Max
200
0.5
10
Cycles
Unit
MHz
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns