AT32UC3C1512C Automotive Atmel Corporation, AT32UC3C1512C Automotive Datasheet - Page 316

• Manufacturer Part Number: AT32UC3C1512C Automotive
• Manufacturer: Atmel Corporation

9166C–AVR-08/11
•Write cycle
Figure 18-11. Write Cycle
The write cycle time is defined as the total duration of the write cycle, that is, from the time where
address is set on the address bus to the point where address may change. The total write cycle
time is equal to:
Similarly,
All NWE and NCS (write) timings are defined separately for each chip select as an integer num-
ber of CLK_SMC cycles. To ensure that the NWE and NCS timings are coherent, the user must
define the total write cycle instead of the hold timing. This implicitly defines the NWE hold time
and NCS (write) hold times as:
And,
A[AD_MSB:2]
NBS0, NBS1,
A0, A1
CLK_SMC
NWE
NCS
NWECYCLE
NCSWRHOLD
NCSWRSETUP
NWECYCLE
NWEHOLD
NWESETUP
=
=
NCSWRSETUP
=
=
NWECYCLE NCSWRSETUP
NWECYCLE NWESETUP
NWESETUP
NCSWRPULSE
NWEPULSE
NWECYCLE
–
+
–
+
NCSWRPULSE
NWEPULSE
–
+
–
NWEPULSE
+
NWEHOLD
NCSWRPULSE
NCSWRHOLD
NWEHOLD
NCSWRHOLD
AT32UC3C
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