Datasheet

 2017 Microchip Technology Inc. DS60001516A-page 143
SAM9G20
19.7.3 8-bit NAND Flash
Figure 19-9: Hardware Configuration - 8-bit NAND Flash
19.7.3.1 Software Configuration - 8-bit NAND Flash
The following configuration has to be performed:
• Assign the EBI CS3 to the NAND Flash by setting the bit EBI_CS3A in the EBI Chip Select Assignment Register located in the bus
matrix memory space
• Reserve A21 / A22 for ALE / CLE functions. Address and Command Latches are controlled respectively by setting to 1 the address
bit A21 and A22 during accesses.
• Configure a PIO line as an input to manage the Ready/Busy signal.
• Configure Static Memory Controller CS3 Setup, Pulse, Cycle and Mode accordingly to NAND Flash timings, the data bus width and
the system bus frequency.
D6
D0
D3
D4
D2
D1
D5
D7
NANDOE
NANDWE
(ANY PIO)
(ANY PIO)
ALE
CLE
D[0..7]
3V3
3V3
2 Gb
TSOP48 PACKAGE
U1 K9F2G08U0MU1 K9F2G08U0M
WE
18
N.C
6
VCC
37
CE
9
RE
8
N.C
20
WP
19
N.C
5
N.C
1
N.C
2
N.C
3
N.C
4
N.C
21
N.C
22
N.C
23
N.C
24
R/B
7
N.C
26
N.C
27
N.C
28
I/O0
29
N.C
34
N.C
35
VSS
36
PRE
38
N.C
39
VCC
12
VSS
13
ALE
17
N.C
11
N.C
10
N.C
14
N.C
15
CLE
16
N.C
25
N.C
33
I/O1
30
I/O3
32
I/O2
31
N.C
47
N.C
46
N.C
45
I/O7
44
I/O6
43
I/O5
42
I/O4
41
N.C
40
N.C
48
R2 10KR2 10K
C2
100NF
C2
100NF
R1
10K
R1
10K
C1
100NF
C1
100NF