Manual

Introduction to Cactus Technologies Industrial
Grade CF -3XX/-3XX-P1/-3XX-WP1 Series Products
01
803M Series Industrial Grade microSD Card Product Manual v2.0Cactus Technologies
®
7
The signal/pin assignments are listed in Table 3-5. Signals are active high unless otherwise specied.
The following sections provide detailed information on the Cactus Technologies Industrial microSD
products interface.
microSD Card Pin Assignments and Pin Type
3.1.
SD Mode
Pin
Num
Signal
Name
Pin
Type
1 Desicription
1
DAT2
I/O/PP
Data Line
bit 2
2
CD/DAT3 2
I/O/PP 3
Card Detect/
Data Line
bit 3
3
CMD
PP
Command/
Response
4
VDD
S
Supply
Power
5
CLK
I Clock
6
VSS2
S
Supply
Ground
7
DAT0
I/O/PP
Data Line
bit 0
8
DAT1
I/O/PP
Data Line
bit 1
9
DAT0
I/O/PP
Data Line
bit 0
Interface
Description03
Table 3-5. microSD interface Pin Assignments and Pin Type
NOTE:
1. S: Power; I: Input; O: Output; PP: Bidirectional
2. DAT[1:3] are inputs on power up.
3. After power up, this pin is input with 50Kohm pullup. The
host can disconnect the pullup by issuing a SET_CLR_
CARD_DETECT command
SPI Mode
Pin
Num
Signal
Name
Pin
Type
1 Desicription
1
NC
No connect
2
CSN
I
Chip Select
(active low)
3
SDI
I Serial Data In
4
VDD
S
Supply
Power
5
SCLK
I Serial Clock
6
VSS2
S
Supply
Ground
7
SDO
O
Serial Data
Out
8
RSV
Reserved
9
RSV
Reserved