RSK+RZA1H
5. User Circuitry
R20UT3007EG0200 Rev. 2.00
Page 18 of 53
May 17, 2015
5.7
SD/MMC
The RSK+ board provides an SD/MMC card socket, CN1. The connections are detailed in Table 5.6.
Signal
Function
MCU
Port
Pin
NAF1_TRACED1_SMWP1
Write Protect
P3_9
W20
NAF0_TRACED0_SMCD
Card Detect
P3_8
V19
NAF5_SMCMD
Command I/O
P3_13
R22
NAF4_SMCLK
Clock
P3_12
T22
NAF3_TRACED3_SMD0
Data 0
P3_11
T21
NAF2_TRACED2_SMD1
Data 1
P3_10
T20
NAF7_SMD2
Data 2
P3_15
R20
NAF6_TRACECLK_SMD3
Data 3
P3_14
R21
P4_0_FRE_MMCD4
Data 4
P4_0
P20
P4_1_FCLE_MMCD5
Data 5
P4_1
P22
P4_2_FALE_MMCD6
Data 6
P4_2
P21
P4_3_FWE_MMCD7
Data 7
P4_3
N22
Table 5.6: SD/MMC Connection
Note that it is not possible to boot from an SD card that is connected to the SD/MMC connector CN1. This is
because the connector utilises channel 1 of the SD controller integrated in the RZ/A1H MCU. For further
information, refer to the hardware manual, table 3.1.
5.8
SDRAM / NOR Flash
The RSK+ board provides 32MByte SDRAM, IC24 and 16MByte NOR Flash, IC23 connected to the address /
data buses.
Note that the SDRAM as fitted on the RSK+ board is configured in hardware to use the Chip Select line CS2.
The BSC module within the RZ/A1H MCU assumes a second SDRAM device will be connected also to CS3.
As such it is necessary that the BSC within the RZ/A1H MCU is configured to use both CS2 and CS3 as
SDRAM, even though a second SDRAM is not present on CS3, and that CS3 is not used on the expansion
headers. As such option link R164 must NOT be fitted, to prevent bus conflicts. By default this link is not fitted,
as this port pin is configured for LED0. For other external memory mapped devices, chip select CS1 remains
available for use.
This is a known limitation of the RSK+ board. For new applications with only one SDRAM it is recommended
to connect the SDRAM to CS3, which will allow single SDRAM use without issue.
See the hardware manual Bus State Controller section 8.4.3 CS2WCR(SDRAM) , p171 for further details.
Note that the NOR Flash is configured to operate on the bus control line CS0. In order for this to operate
Jumper link JP18 and resistor link R314 (fitted as default) must be connected. Refer to the RSK+RZA1H
board schematics for further information.
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