Datasheet

81
9166DS–AVR-01/12
AT32UC3C
Note: 1. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same pro-
cess technology. These values are not covered by test limits in production.
Note: 1. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same pro-
cess technology. These values are not covered by test limits in production.
2. hold length = total cycle duration - setup duration - pulse duration. “hold length” is for “ncs wr hold length” or “nwe hold
length”
Table 7-54. SMC Read Signals with no Hold Settings
(1)
Symbol Parameter Conditions Min Units
NRD Controlled (READ_MODE = 1)
SMC
19
Data setup before NRD high V
VDD
= 3.0V,
drive strength of the pads set to the lowest,
external capacitor = 40pF
34.4
ns
SMC
20
Data hold after NRD high 0
NRD Controlled (READ_MODE = 0)
SMC
21
Data setup before NCS high V
VDD
= 3.0V,
drive strength of the pads set to the lowest,
external capacitor = 40pF
30.2
ns
SMC
22
Data hold after NCS high 0
Table 7-55. SMC Write Signals with Hold Settings
(1)
Symbol Parameter Conditions Min Units
NRD Controlled (READ_MODE = 1)
SMC
23
Data Out valid before NWE high
V
VDD
= 3.0V,
drive strength of the pads set
to the lowest,
external capacitor = 40pF
(nwe pulse length - 1) * t
CPSMC - 1.7
ns
SMC
24
Data Out valid after NWE high
(2)
nwe pulse length * tCPSMC - 5.1
SMC
25
NWE high to NBS0/A0 change
(2)
nwe pulse length * tCPSMC - 2.8
SMC
29
NWE high to NBS2/A1 change
(2)
nwe pulse length * tCPSMC - 0.8
SMC
31
NWE high to A2 - A25 change
(2)
nwe pulse length * tCPSMC - 7.2
SMC
32
NWE high to NCS inactive
(2)
(nwe hold pulse - ncs wr hold length) *
tCPSMC - 2.6
SMC
33
NWE pulse width nwe pulse length * tCPSMC - 0.4
NRD Controlled (READ_MODE = 0)
SMC
34
Data Out valid before NCS high
V
VDD
= 3.0V,
drive strength of the pads set
to the lowest,
external capacitor = 40pF
(ncs wr pulse length - 1) * t
CPSMC - 2.5
ns
SMC
35
Data Out valid after NCS high
(2)
ncs wr hold length * tCPSMC - 5.5
SMC
36
NCS high to NWE inactive
(2)
(ncs wr hold length - nwe hold length) *
t
CPSMC - 2.2