TSC21020F Datasheet, PDF (38/50 Pages) ATMEL Corporation – Rad. Hard 32/40-bit IEEE Floating Point DSP

Figure 11. Memory Write
Parameter
20 MHz
Min
Max
Frequency
Dependency⁽¹⁾
Min
Max
Unit
t_DWHA Address, Select Hold
1
1 + DT/16
ns
after xWR Deasserted⁽²⁾
t_HDWH Data Hold after xWR
0
DT/16
ns
Deasserted⁽²⁾
t_DAP xPAGE Delay from
1
ns
Address, Select
t_DCKWL CLKIN High to xWR
16
Low
26
16 + DT/4 26 + DT/4
ns
t_WWR xWR High to xWR or xRD 17
17 +
ns
Low
7DT/16
t_DDWR Data Disable before
13
13 + 3DT/8
ns
xWR or xRD Low
t_WDE xWR Low to Data Enabled 0
DT/16
ns
Notes:
1. DT = t_C - 50 ns
2. See "System Hold Time Calculation" in "Test Conditions" section for calculating hold
times given capacitive and DC loads.
x = PM or DM; Address = PMA23-0, DMA31-0; Data = PMD47-0, DMD39-0; Select
= PMS1-0, DMS3-0; guaranteed by design.
38 TSC21020F
4153H–AERO–04/07