T
T
TS
S
S2
2
2G
G
GS
S
SD
D
D1
1
15
5
50
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).