With the support of the Quad SPI protocol, the system can use high-performance serial Flash memories which are
small and inexpensive compared to parallel Flash memories.
Figure 3-29. Octal SPI Flash Schematic
MX66LM1G45GXDI00
NC A2
NC A3
RESET#
A4
ECS#
A5
NC
B1 SCLK
B2
VSS B3
VCC B4
NC B5
VSSQ C1
CS#
C2
DQS
C3
DQ2
C4
NC C5
VCCQ D1
DQ1
D2 DQ0
D3
DQ3
D4
DQ4
D5
DQ7
E1 DQ6
E2 DQ5
E3
VCCQ E4
VSSQ E5
133 MHz at VCC=VCCQ=3.3V
U9
OSPI0_IO3_PB9
OSPI0_IO2_PB10
OSPI0_IO1_PB11
OSPI0_IO0_PB12
OSPI0_CS
OSPI0_SCK_PB14
OSPI0_IO4_PB16
OSPI0_IO5_PB17
OSPI0_IO6_PB18
OSPI0_IO7_PB19
OSPI0_DQS_PB20
OSPI0_INT_PB21
VDD_3V3
4.7uF
10V
0402
C132
i
OSPI
Matched Net Lengths [Tolerance = 0.25mm]
GND
0.1uF
10V
0402
C134
0.1uF
10V
0402
C133
0.1uF
10V
0402
C135
0402
R134
0402
R136
nRST
NRST_OUT
Octal SPI Memory
10k
0402
1%
R137
VDD_3V3
50
Ω
± 10% single-ended trace impedance
Table 3-15. Octal SPI Flash Signal Description
PIO
Signal Name
Shared PIO
Signal Description
PB9
QSPI0_IO3_PB9
–
QSPI0 I/O line 3
PB10
QSPI0_IO2_PB10
–
QSPI0 I/O line 2
PB11
QSPI0_IO1_PB11
–
QSPI0 I/O line 1
PB12
QSPI0_IO0_PB12
–
QSPI0 I/O line 0
PB13
QSPI0_CS
–
QSPI0 Chip Select
PB14
QSPI0_DDR_CK_P
–
QSPI0 serial clock
PB16
QSPI0_IO4_PB16
–
QSPI0 I/O line 4
PB17
QSPI0_IO5_PB17
–
QSPI0 I/O line 5
PB18
QSPI0_IO6_PB18
–
QSPI0 I/O line 6
PB19
QSPI0_IO7_PB19
–
QSPI0 I/O line 7
PB20
QSPI0_DQS_PB20
–
QSPI00 data strobe
PB21
QSPI0_INT_PB21
–
QSPI0 interrupt
nRST/
NRST_OUT
RESET#
–
Reset line from processor or from general reset
3.3.4
Dual Serial EEPROM
The SAMA7G54-EK board embeds two Microchip 24AA025E48 serial Electrically-Erasable Programmable Read-
Only Memories (EEPROMs).
The 24AA025E48 features 2048 bits of serial EEPROMs organized as 256 words of eight bits each and is accessed
via an I
2
C-compatible (2-wire) serial interface. In addition, the 24AA025E48 incorporates an easy and inexpensive
method to obtain a globally unique MAC or EUI address (EUI-48). For more information about the 24AA025E48, refer
to the product
SAMA7G54-EK
Function Blocks
©
2022 Microchip Technology Inc.
and its subsidiaries
User Guide
DS50003273A-page 38