M13design M13-RA6M3-EK, User Manual, Page: 16 / 52

User Manual - Rev1.0.2 M13-RA6M3-EK pin assignment
M13design - 16 Dec. 21 16/53
3.2.2 SDRAM
The M13-RA6M3-EK is also equipped with an external 16 bits SDRAM. This memory device is
controlled by the RA6M3 Bus State Controller. Table 9 shows the SDRAM Memory Overview while
Table 10 shows the pin assignment between the RA6M3 and the SDRAM device.
Table 9. SDRAM overview
Device Type MFR 1 / MPN 2 Operational Voltage Capacity Package
SDRAM
Winbond /
W9825G6KH-6I
3.3V 32Mbyte TSOP54
Note 1: Manufacturer name
Note 2: Manufacturer Part Number
Table 10. SDRAM Address Bus Pin Assignment
U1 Pin RA6M3 Pin Functions
Board
Assignment
Signal Name
Default
Function
Remarks
96 P115 / SSITXD0_B / A01 Multiplexed A1 SSIE0
95 P114 / SSIRXD0_B / A02 Multiplexed A2 SSIE0
94 P113 / SSILRCK0 / A03 Multiplexed A3 SSIE0
93 P112 / SSIBCK0_B / A04 Multiplexed A4 SSIE0
92 P111 / IRQ4 / A05 Multiplexed A5 PMOD2
87 P301 / RXD2 / A06 Multiplexed A6 MIKROBUS
86 P302 / TXD2 / A07 Multiplexed A7 MIKROBUS
85 P303 / A08 SDRAM A8 SDRAM
82 P304 / SCL6 / A09 Multiplexed A9 SCI6
81 P305 / SD6 / A10 Multiplexed A10 SCI6
80 P306 / A11 SDRAM A11 SDRAM
79 P307 / A12 SDRAM A12 SDRAM
78 P308 / A13 SDRAM A13 SDRAM
77 P309 / A14 SDRAM A14 SDRAM
76 P310 / A15 SDRAM A15 SDRAM
132 P100 / MISOA_A / DQ0 Multiplexed DQ0 SPI
131 P101 / MOSIA_A / DQ1 Multiplexed DQ1 SPI
130 P102 / RSPCKA_A / DQ2 Multiplexed DQ2 SPI
129 P103 / SSLA0_A / DQ3 SDRAM DQ3 SDRAM
128 P104 / SSLA1_A / DQ4 Multiplexed DQ4 PMOD1
127 P105 / SSLA2_A / DQ5 Multiplexed DQ5 PMOD2
126 P106 / SSLA3_A / DQ6 SDRAM DQ6 SDRAM
125 P107 / DQ7 SDRAM DQ7 SDRAM
103 P612 / DQ8 SDRAM DQ8 SDRAM
104 P613 / DQ9 SDRAM DQ9 SDRAM
105 P614 / DQ10 SDRAM DQ10 SDRAM
117 P605 / DQ11 SDRAM DQ11 SDRAM
118 P604 / DQ12 SDRAM DQ12 SDRAM
119 P603 / DQ13 SDRAM DQ13 SDRAM
133 P800 / DQ14 SDRAM DQ14 SDRAM
134 P801 / DQ15 SDRAM DQ15 SDRAM
100 P609 / CKE SDRAM CKE SDRAM
99 P608 / A0 / DQM1 SDRAM A00/DQM1 SDRAM UDQM
121 P601 / DQM0 Multiplexed DQM0 PMOD2 LDQM
75 P311 / RAS SDRAM RAS# SDRAM
102 P611 / SDCS# SDRAM SDCS# SDRAM
74 P312 / CAS SDRAM CAS# SDRAM
101 P610 / WE SDRAM WE# SDRAM
As detailed in the Table 10 , the SDRAM device U9 is by default not connected to the RA6M3 MCU even
though it is included on the board. Check section 5.1 SDRAM Selection to see how the SDRAM can be
selected.