HB28D032MM2 datasheet(40/90 Pages) RENESAS

40 / 90 page

HB28H016/D032/B064/B128MM2

Rev.5.0, Jan. 2003, page 38 of 88

The card will transfer the requested number of data blocks, terminate the transaction and return to

transfer state. Stop command is not required at the end of this type of multiple block write, unless

terminated with an error. In order to start a multiple block write with pre-defined block count, the

host must use the SET_BLOCK_COUNT command (CMD23) immediately preceding the

WRITE_MULTIPLE_BLOCK (CMD25) command. Otherwise the card will start an open-ended

multiple block write which can be stopped using the STOP_TRANSMISSION command.

The host can abort writing at any time, within a multiple block operation, regardless of the its type.

Transaction abort is done by sending the stop transmission command. If a multiple block write with

predefined block count is aborted, the data in the remaining blocks is not defined.

If the card detects an error (e.g. write protect violation, out of range, address misalignment, internal error,

etc.) during a multiple block write operation (both types) it will ignore any further incoming data blocks

and remain in the Receive State. The host must than abort the operation by sending the stop transmission

command. The write error is reported in the response to the stop transmission command.

If the host sends a stop transmission command after the card received the last block of a multiple block

write with a pre-defined number of blocks, it will be responded to as an illegal command, since the card is

no longer in rcv state.

If the host uses partial blocks whose accumulated length is not block aligned and block misalignment is not

allowed (CSD parameter WRITE_BLK_MISALIGN is not set), the card will detect the block misalignment

error and abort programming before the beginning of the first misaligned block. The card will set the

ADDRESS_ERROR error bit in the status register, and wait (in the Receive-data-State) for a stop

command while ignoring all further data transfer. The write operation will also be aborted if the host tries

to write over a write-protected area. In this case, however, the card will set the WP_VIOLATION bit.

Programming of the CID and CSD register does not require a previous block length setting. The

transferred data is also CRC protected.

• Erase

It is desirable to erase as many sectors at a time as possible in order to enhance the data throughput.

Identification of these sectors is accomplished with the TAG_* commands. Either an arbitrary set of

sectors within a single erase group, or an arbitrary selection of erase groups may be erased at one time, but

not both together. That is, the unit of measure for determining an erase is either a sector or an erase group,

but if a sector, all selected sectors must lie within the same erase group. To facilitate selection, a first

command with the starting address is followed by a second command with the final address, and all sectors

within this range will be selected for erase. After a range is selected, an individual sector (or group) within

that range can be removed using the UNTAG command. The host must adhere to the following command

sequence; TAG_SECTOR_START, TAG_SECTOR_END, UNTAG_SECTOR (up to 16 untag sector

commands can be sent for one erase cycle) and ERASE (or the same sequence for group tagging). The

following exception conditions are detected by the card: An erase or tag/untag command is received out of

sequence. The card will set the ERASE_SEQUENCE error bit in the status register and reset the whole

sequence. An out of sequence command (except SEND_STATUS) is received. The card will set the

ERASE_RESET status bit in the status register, reset the erase sequence and execute the last command. If

the erase range includes write protected sectors, they will be left intact and only the non-protected sectors

will be erased. The WP_ERASE_SKIP status bit in the status register will be set. The address field in the

tag commands is a sector or a group address in byte units. The card will ignore all LSB’s below the group

or sector size. The number of untags commands (CMD34 and CMD37) which are used in a sequence is

HB28D032MM2 Datasheet(PDF) 40 Page - Renesas Technology Corp

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