T
T
T
S
S
S
2
2
2
G
G
G
S
S
S
D
D
D
1
1
1
5
5
5
0
0
0
2GB 150x Secure Digital Card
Transcend Information Inc.
7
Figure 12: Read operation - data error
• Data Write
Single and multiple block write operations are supported in SPI mode. Upon reception of a valid write command, the
card will respond with a response token and will wait for a data block to be sent from the host. CRC suffix, block
length and start address restrictions are identical to the read operation (see Figure 13).
Figure 13: Write operation
After a data block has been received, the card will respond with a data-response token. If the data block has been
received without errors, it will be programmed. As long as the card is busy programming, a continuous stream of busy
tokens will be sent to the host (effectively holding the DataOut line low).
