Datasheet

06 February 2012 Broadcom Europe Ltd. 406 Science Park Milton Road Cambridge CB4 0WW Page 68
© 2012 Broadcom Corporation. All rights reserved
Synopsis
This register contains the argument for the SD card specific command ACMD23
(SET_WR_BLK_ERASE_COUNT). ARG2 must be set before the ACMD23 command
is issued using the CMDTM register.
Bit(s)
Field Name
Description
Type
Reset
31:0 ARGUMENT Argument to be issued with ACMD23 RW 0x0
BLKSIZECNT Register
Synopsis
This register must not be accessed or modified while any data transfer between card
and host is ongoing.
It contains the number and size in bytes for data blocks to be transferred. Please note
that the EMMC module restricts the maximum block size to the size of the internal data
FIFO which is 1k bytes.
BLKCNT is used to tell the host how many blocks of data are to be transferred. Once
the data transfer has started and the TM_BLKCNT_EN bit in the CMDTM register is
set the EMMC module automatically decreases the BNTCNT value as the data blocks
are transferred and stops the transfer once BLKCNT reaches 0.
Bit(s)
Field Name
Description
Type
Reset
31:16 BLKCNT Number of blocks to be transferred RW 0x0
15:10
Reserved
-
Write as 0, read as don't care
9:0 BLKSIZE Block size in bytes RW 0x0
ARG1 Register
Synopsis
This register contains the arguments for all commands except for the SD card specific
command ACMD23 which uses ARG2. ARG1 must be set before the command is
issued using the CMDTM register.
Bit(s)
Field Name
Description
Type
Reset
31:0 ARGUMENT Argument to be issued with command RW 0x0