SAM3S8C Atmel Corporation, SAM3S8C Datasheet - Page 322

• Manufacturer Part Number: SAM3S8C
• Manufacturer: Atmel Corporation

19.3.4.2
322
322
SAM3S8/SD8
SAM3S8/SD8
Read Handshaking
For details on the read handshaking sequence, refer to
Figure 19-3.
Table 19-5.
Step
1
2
3
4
5
6
7
8
9
10
11
12
13
MODE[3:0]
DATA[15:0]
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
Programmer Action
Waits for NVALID high
Sets DATA in output mode
Sets NCMD signal
Waits for RDY high
NVALID
NCMD
Read Handshake
Parallel Programming Timing, Read Sequence
NOE
RDY
1
2
Adress IN
ADDR
3
4
5
Waits for NCMD low
Latch MODE and DATA
Clears RDY signal
Waits for NOE Low
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
Sets DATA bus in input mode
Z
6
Figure 19-3
7
Data OUT
8
9
and
10
11
Table
X
12
11090A–ATARM–10-Feb-12
11090A–ATARM–10-Feb-12
19-5.
13
IN
DATA I/O
Input
Input
Input
Input
Tristate
Output
Output
Output
Output
X
Input
Input
Input