SAM3X8E Atmel Corporation, SAM3X8E Datasheet - Page 318

• Manufacturer Part Number: SAM3X8E
• Manufacturer: Atmel Corporation

20.2.4.2
Table 20-6.
20.2.5
318
318
Step
1
2
3
4
5
6
7
8
9
10
11
12
13
SAM3X/A
SAM3X/A
Device Operations
Programmer Action
Sets MODE and DATA signals
Clears NCMD signal
Waits for RDY low
Sets DATA signal in tristate
Clears NOE signal
Waits for NVALID low
Reads value on DATA Bus
Sets NOE signal
Waits for NVALID high
Sets DATA in output mode
Sets NCMD signal
Waits for RDY high
Read Handshaking
Read Handshake
For details on the read handshaking sequence, refer to
Figure 20-3.
Several commands on the Flash memory are available. These commands are summarized in
Table 20-4 on page
face running several read/write handshaking sequences.
When a new command is executed, the previous one is automatically achieved. Thus, chaining
a read command after a write automatically flushes the load buffer in the Flash.
MODE[3:0]
DATA[15:0]
NVALID
NCMD
Parallel Programming Timing, Read Sequence
NOE
RDY
316. Each command is driven by the programmer through the parallel inter-
1
Waits for NCMD low
Latch MODE and DATA
Clears RDY signal
Sets DATA bus in output mode and outputs
the flash contents.
Clears NVALID signal
Waits for NOE high
Sets NVALID signal
Waits for NCMD high
Sets RDY signal
Device Action
Waits for NOE Low
Sets DATA bus in input mode
2
Adress IN
ADDR
3
4
5
Z
6
Figure 20-3
7
Data OUT
8
9
and
DATA I/O
Input
Input
Input
Input
Tristate
Output
Output
Output
Output
X
Input
Input
Input
10
11
Table
X
12
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
20-6.
13
IN