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SMSXXXAF 数据表(PDF) 21 Page - Numonyx B.V

部件名 SMSXXXAF
功能描述  64 MByte, 128 MByte, 256 MByte 512 MByte and 1 GByte, 3.3V Supply Secure Digital??Card
PDF  61 Pages
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制造商  NUMONYX [Numonyx B.V]
网页  http://www.numonyx.com
标志 NUMONYX - Numonyx B.V

SMSXXXAF 数据表(HTML) 21 Page - Numonyx B.V

Back Button SMSXXXAF Datasheet HTML 17Page - Numonyx B.V SMSXXXAF Datasheet HTML 18Page - Numonyx B.V SMSXXXAF Datasheet HTML 19Page - Numonyx B.V SMSXXXAF Datasheet HTML 20Page - Numonyx B.V SMSXXXAF Datasheet HTML 21Page - Numonyx B.V SMSXXXAF Datasheet HTML 22Page - Numonyx B.V SMSXXXAF Datasheet HTML 23Page - Numonyx B.V SMSXXXAF Datasheet HTML 24Page - Numonyx B.V SMSXXXAF Datasheet HTML 25Page - Numonyx B.V Next Button
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SMSxxxAF, SMSxxxFF, SMSxxxBF
Secure digital memory card interface
21/61
Figure 11.
SD Memory Card State Diagram (Card Identification Mode)
3.4.2
Data Transfer Mode
Cards enter the Data Transfer mode once their Relative Card Addresses (RCA) have been
published.
The host enters the Data Transfer mode after identifying all the cards on the bus.
The host issues SEND_CSD (CMD9) to obtain the contents of the Card Specific Data (CSD)
Register for each card. The CSD Register contains information like the block length and the
card storage.
Until the host knows the contents of all the CSD Registers, the fPP clock rate must remain at
fOD because some cards may have operating frequency limitations.
The broadcast command SET_DSR (CMD4) configures the driver stages of all identified
cards. It programs their Driver Stage Registers (DSR) according to the application bus
layout (length), the number of cards on the bus and the data transfer frequency. The clock
rate is changed from fOD to fPP at that point. The SET_DSR command is an option for the
card and the host.
CMD7 is used to select one card and switch it to the Transfer State. Only one card can be in
Transfer State at a given time. If a previously selected card is still in Transfer State when the
host uses CMD7 to switch another card to the Transfer state, then the connection between
the previously selected card and the host is released and the card reverts to the Standby
State.
SPI Operation
Mode
CMD0 +
CS asserted
Idle State
(Idle)
CMD0
from all states
except for (ina)
ACMD41
Ready State
(ready)
CMD2
Identification State
(ident)
CMD3
Stand-by State
(stby)
Power-on
Inactive State
(ina)
CMD15
Card with
incompatible
voltage range
Card is busy or
host omitted
voltage range
Start MultiMediaCard
initialization process
starting at CFM1
No response (invalid command),
must be a MultiMediaCard
Card responds
with new RCA
CMD0
Card Responds
with new RCA
from all states in
Data Transfer mode
Card Identification mode
Data Transfer mode
ai10037



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