Datasheet

295
11011B–ATARM–21-Feb-12
SAM3N
19.2.4.2 Read Handshaking
For details on the read handshaking sequence, refer to Figure 19-5 Figure 19-6 and Table 19-5 .
Figure 19-5. SAM3NxB/C (64/100 pins) Parallel Programming Timing, Read Sequence
Figure 19-6. SAM3NxA (48 pins) Parallel Programming Timing, Read Sequence
Table 19-4. Write Handshake
Step Programmer Action Device Action Data I/O
1 Sets MODE and DATA signals Waits for NCMD low Input
2 Clears NCMD signal Latches MODE and DATA Input
3 Waits for RDY low Clears RDY signal Input
4 Releases MODE and DATA signals Executes command and polls NCMD high Input
5 Sets NCMD signal Executes command and polls NCMD high Input
6 Waits for RDY high Sets RDY Input
NCMD
RDY
NOE
NVALID
DATA[7:0]
MODE[3:0]
1
2
3
4
5
6
7
9
8
ADDR
Adress IN Z
Data OUT
10
11
XIN
12
13
NCMD
RDY
NOE
NVALID
DATA[15:0]
MODE[3:0]
1
2
3
4
5
6
7
9
8
ADDR
Adress IN Z
Data OUT
10
11
XIN
12
13