STK17T88Document Number: 001-52040 Rev. *A Page 7 of 22
SRAM WRITE Cycles #1 and #2
Figure 7. SRAM WRITE Cycle #1: W Controlled[7, 8]
Figure 8. SRAM WRITE Cycle #2: E Controlled[7, 8]
Notes
7. If W is low when E goes low, the outputs remain in the high-impedance state.
8. E or W must be ≥ V
IH
durin
g
address transitions.
NO. Symbols Parameter STK17T88-25 STK17T88-45 Units
#1 #2 Alt. Min Max Min Max
12 tAVAV tAVAV tWC Write Cycle Time 25 45 ns
13 tWLWH tWLEH tWP Write Pulse Width 20 30 ns
14 tELWH tELEH tCW Chip Enable to End of Write 20 30 ns
15 tDVWH tDVEH tDW Data Set-up to End of Write 10 15 ns
16 tWHDX tEHDX tDH Data Hold after End of Write 0 0 ns
17 tAVWH tAVEH tAW Address Set-up to End of Write 20 30 ns
18 tAVWL tAVEL tAS Address Set-up to Start of Write 0 0 ns
19 tWHAX tEHAX tWR Address Hold after End of Write 0 0 ns
20 tWLQZ tWZ Write Enable to Output Disable 10 15 ns
21 tWHQX tOW Output Active after End of Write 3 3 ns
PREVIOUS DATA
DATA OUT
E
ADDRESS
12
tAVAV
W
16
tWHDX
DATA IN
19
tWHAX
13
tWLWH
18
tAVWL
17
tAVWH
DATA VALID
20
tWLQZ
15
tDVWH
HIGH IMPEDANCE
21
tWHQX
14
tELWH
DATA IN
12
tAVAV
16
tEHDX
13
tWLEH
19
tEHAX
18
tAVEL
17
tAVEH
DATA VALID
15
tDVEH
HIGH IMPEDANCE
14
tELEH
DATA OUT
E
ADDRESS
W
DATA IN