Secure digital input/output interface (SDIO) RM0402
894/1163 RM0402 Rev 6
ERASE_SIZE
This 16-bit field indicates NERASE. When NERASE numbers of AUs are erased, the timeout
value is specified by ERASE_TIMEOUT (Refer to
ERASE_TIMEOUT). The host should
determine the proper number of AUs to be erased in one operation so that the host can
show the progress of the erase operation. If this field is set to 0, the erase timeout
calculation is not supported.
ERASE_TIMEOUT
This 6-bit field indicates TERASE and the value indicates the erase timeout from offset when
multiple AUs are being erased as specified by ERASE_SIZE. The range of
ERASE_TIMEOUT can be defined as up to 63 seconds and the card manufacturer can
choose any combination of ERASE_SIZE and ERASE_TIMEOUT depending on the
implementation. Determining ERASE_TIMEOUT determines the ERASE_SIZE.
ERASE_OFFSET
This 2-bit field indicates TOFFSET and one of four values can be selected. This field is
meaningless if the ERASE_SIZE and ERASE_TIMEOUT fields are set to 0.
Table 175. Erase size field
ERASE_SIZE Value definition
0000h Erase timeout calculation is not supported.
0001h 1 AU
0002h 2 AU
0003h 3 AU
--------- ---------
FFFFh 65535 AU
Table 176. Erase timeout field
ERASE_TIMEOUT Value definition
00 Erase timeout calculation is not supported.
01 1 [sec]
02 2 [sec]
03 3 [sec]
--------- ---------
63 63 [sec]
Table 177. Erase offset field
ERASE_OFFSET Value definition
0h 0 [sec]
1h 1 [sec]
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