tsc21020f ATMEL Corporation, tsc21020f Datasheet - Page 35

• Manufacturer Part Number: tsc21020f
• Description: Rad. Hard 32/40-bit Ieee Floating Point Dsp
• Manufacturer: ATMEL Corporation

External Memory Three-State Control
Figure 9. External Memory Three-State Control
4153H–AERO–04/07
Parameter
t
High
t
Address, Select
t
XWR Low
t
Disable before CLKIN High
t
Select Enable
Notes:
STS
DADTS
DSTS
DTSD
DTSAE
XTS, Setup before CLKIN
XTS, Delay after XRD,
Memory Interface
XTS High to Address,
XTS Delay after
1. DT = t
XTS should only be asserted (low) during an active memory access cycle.
Memory Interface = PMA23-0, PMD47-0, PMS1-0, PMRD, PMWR, PMPAGE,
DMA31-0, DMD39-0, DMS3-0, DMRD, DMWR, DMPAGE.
Address = PMA23-0, DMA31-0, Select = PMS1-0, DMS3-0
x = PM or DM.
CK
- 50 ns
Min
14
0
0
20 MHz
Max
50
28
16
14 + DT/4
DT/4
Min
Dependency
Frequency
28 + 7DT/8
16 + DT/2
Max
t
(1)
CK
Unit
ns
ns
ns
ns
ns
35