STK14C88N45 Cypress Semiconductor Corp, STK14C88N45 Datasheet - Page 14

• Manufacturer Part Number: STK14C88N45
• Manufacturer: Cypress Semiconductor Corp
• Type: NVSRAMr

Specifications of STK14C88N45

• Word Size: 8b
• Organization: 32Kx8
• Density: 256Kb
• Interface Type: Parallel
• Access Time (max): 45ns
• Operating Supply Voltage (typ): 5V
• Package Type: SOIC
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• Operating Temp Range: 0C to 70C
• Pin Count: 32
• Mounting: Surface Mount
• Supply Current: 70mA
• Lead Free Status / RoHS Status: Not Compliant

Software STORE/RECALL Mode Selection
Software-Controlled STORE/RECALL Cycle
Document Number: 001-52038 Rev. *B
Notes
17. The six consecutive addresses must be in the order listed. W must be high during all six consecutive E controlled cycles to enable a nonvolatile cycle.
18. While there are 15 addresses on the STK14C88, only the lower 14 are used to control software modes.
19. I/O state assumes G < V
20. The software sequence is clocked on the falling edge of E controlled reads without involving G (double clocking aborts the sequence).
21. The six consecutive addresses must be in the order listed in the Software STORE/RECALL Mode Selection Table: (0E38, 31C7, 03E0, 3C1F, 303F, 0FC0) for a STORE
NO.
33
34
35
36
37
cycle or (0E38, 31C7, 03E0, 3C1F, 303F, 0C63) for a RECALL cycle. W must be high during all six consecutive cycles.
E
L
L
Standard
t
RECALL
t
t
t
t
ELEH
ELAX
AVAV
AVEL
Symbols
W
H
H
ADDRESS
DQ (DATA
Alt.
t
t
t
E
CW
RC
AS
IL
A
. Activation of nonvolatile cycles does not depend on state of G.
13
STORE/RECALL Initiation Cycle Time
Address Setup Time
Clock Pulse Width
Address Hold Time
RECALL Duration
- A
3C1F
0FC0
3C1F
0E38
31C7
03E0
303F
0E38
31C7
03E0
303F
0C63
0
t
(hex)
AVEL
34
Figure 10. E Controlled Software STORE/RECALL Cycle
ADDRESS #1
t
AVAV
33
Parameter
t
DATA VALID
ELEH
35
t
ELAX
36
Nonvolatile RECALL
Nonvolatile STORE
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Mode
STK14C88-25 STK14C88-35 STK14C88-45
Min
35
25
20
ADDRESS #6
0
t
AVAV
33
DATA VALID
DATA VALID
Max
20
Output High Z
Output High Z
Output Data
Output Data
Output Data
Output Data
Output Data
Output Data
Output Data
Output Data
Output Data
Output Data
I/O
Min
t
STORE
45
30
20
0
29
HIGH IMPEDANCE
/
t
RECALL
Max
37
20
[21]
Min
POWER
55
20
35
Active
Active
0
I
CC2
Max
20
STK14C88
13, 17, 18, 19
13, 17, 18, 19
Unit
ns
ns
ns
ns
μs
Page 14 of 19
Notes
Notes
20, 21
20, 21
20, 21
13
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