AT32UC3C2512C-A2UT【PDF 92/110 页】IC MCU AVR32 512K FLASH 64TQFP

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32117DS–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

Data setup before NRD high

VDD = 3.0V,

drive strength of the pads set to the lowest,

external capacitor = 40pF

32.5

SMC20

Data hold after NRD high

NRD Controlled (READ_MODE = 0)

SMC

Data setup before NCS high

VDD = 3.0V,

drive strength of the pads set to the lowest,

external capacitor = 40pF

28.5

SMC22

Data hold after NCS high

Table 7-55.

SMC Write Signals with Hold Settings(1)

Symbol

Parameter

Conditions

Min

Units

NRD Controlled (READ_MODE = 1)

SMC23

Data Out valid before NWE high

VDD = 3.0V,

drive strength of the pads set

to the lowest,

external capacitor = 40pF

(nwe pulse length - 1) * tCPSMC - 1.4

SMC

Data Out valid after NWE high(2)

nwe pulse length * tCPSMC - 4.7

SMC25

NWE high to NBS0/A0 change(2)

nwe pulse length * tCPSMC - 2.7

SMC

NWE high to NBS2/A1 change(2)

nwe pulse length * tCPSMC - 0.7

SMC

NWE high to A2 - A25 change(2)

nwe pulse length * tCPSMC - 6.8

SMC

NWE high to NCS inactive(2)

(nwe hold pulse - ncs wr hold length) *

tCPSMC - 2.5

SMC

NWE pulse width

nwe pulse length * tCPSMC - 0.2

NRD Controlled (READ_MODE = 0)

SMC

Data Out valid before NCS high

VVDD = 3.0V,

drive strength of the pads set

to the lowest,

external capacitor = 40pF

(ncs wr pulse length - 1) * tCPSMC - 2.2

SMC

Data Out valid after NCS high(2)

ncs wr hold length * tCPSMC - 5.1

SMC

NCS high to NWE inactive(2)

(ncs wr hold length - nwe hold length) *

tCPSMC - 2

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