N58 Hardware User Guide
Chapter 5 Application Interfaces
Copyright © Neoway Technology Co., Ltd. All rights reserved.
49
5.3.4 SDIO
Pin Name
Pin No.
I/O
Function
Remarks
SDC_PWR_EN
2
DO
Enabling of the power supply
for SD cards
-
SDC_DATA_2
3
B
SDIO data bit 2
-
SDC_DATA_3
4
B
SDIO data bit 3
-
SDC_CMD
5
B
SDIO command
-
SDC_CLK
6
DO SDIO clock
-
SDC_DATA_0
7
B
SDIO data bit 0
-
SDC_DATA_1
8
B
SDIO data bit 1
-
SDC_DET
96
DI
SD detection
-
VDD_SDCPULL
103
PO
Pull-up power supply for the
SD card SDIO bus
It is forbidden to supply power
to other loads. Leave this pin
floating if it is not used.
The SDIO interface supports 1.8 V/3.0 V dual-voltage and supports a clock frequency of up to 33.33
MHz. The following figure shows the SDIO reference design.
Figure 5-25 SDIO reference design
SDC_ CLK
SDC_ CMD
SDC_ DATA 0
1
N58 Module
2
3
SD power
suppy
VCC
CLK
CMD
DET
VDD_SDCPULL
_
1
0
k
Ω
4
7
k
Ω
VDD
47 k
Ω
4
7
k
Ω
4
7
k
Ω
4
7
k
Ω
SDC_PWR_EN
P
1 8
SD Card Slot
4
.7
uF
33
pF
SDC _ DATA
SDC _ DATA
SDC_ DET
SDC _ DATA
DATA0
DATA1
DATA2
DATA3
