
978
32072H–AVR32–10/2012
AT32UC3A3
Note:
1. hold length = total cycle duration - setup duration - pulse duration. “hold length” is for “ncs wr hold length” or “nwe hold
length"
Table 36-32. SMC Read Signals with no Hold Settings
Symbol
Parameter
Min.
Unit
NRD Controlled (READ_MODE = 1)
SMC
19
Data Setup before NRD High
13.7
ns
SMC20
Data Hold after NRD High
1
ns
NRD Controlled (READ_MODE = 0)
SMC
21
Data Setup before NCS High
13.3
ns
SMC22
Data Hold after NCS High
0
ns
Table 36-33. SMC Write Signals with Hold Settings
Symbol
Parameter
Min.
Unit
NRD Controlled (READ_MODE = 1)
SMC
23
Data Out Valid before NWE High
(nwe pulse length - 1) * t
CPSMC - 0.9
ns
SMC24
Data Out Valid after NWE High
(1)nwe hold length * tCPSMC - 6
ns
SMC25
NWE High to NBS0/A0 Change
(1)nwe hold length * tCPSMC - 1.9
ns
SMC
26
NWE High to NBS1 Change
(1)nwe hold length * t
CPSMC - 1.9
ns
SMC29
nwe hold length * tCPSMC - 1.9
ns
SMC
31
NWE High to A2 - A23 Change
(1)nwe hold length * t
CPSMC - 1.7
ns
SMC
32
NWE High to NCS Inactive
(1)(nwe hold length - ncs wr hold length)* t
CPSMC - 2.9
ns
SMC33
NWE Pulse Width
nwe pulse length * tCPSMC - 0.9
ns
NRD Controlled (READ_MODE = 0)
SMC
34
Data Out Valid before NCS High
(ncs wr pulse length - 1)* t
CPSMC - 4.6
ns
SMC35
Data Out Valid after NCS High
(1)ncs wr hold length * tCPSMC - 5.8
ns
SMC
36
(ncs wr hold length - nwe hold length)* t
CPSMC - 0.6
ns
Table 36-34. SMC Write Signals with No Hold Settings (NWE Controlled only)
Symbol
Parameter
Min.
Unit
SMC
37
NWE Rising to A2-A25 Valid
5.4
ns
SMC
38
NWE Rising to NBS0/A0 Valid
5
ns
SMC39
NWE Rising to NBS1 Change
5
ns
SMC
40
NWE Rising to A1/NBS2 Change
5
ns
SMC41
NWE Rising to NBS3 Change
5
ns
SMC42
NWE Rising to NCS Rising
5.1
ns