Specifications

©Copyright 2001-2013 SD Group (Panasonic, SanDisk, Toshiba) and SD Card Association
Physical Layer Simplified Specification Version 4.10
90
• ERASE_TIMEOUT
This 6-bit field indicates the T
ERASE
and the value indicates erase timeout from offset when multiple AUs
are 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. Once ERASE_TIMEOUT is determined, it
determines the ERASE_SIZE. The host can determine timeout for any number of AU erase by the
Equation (6). Refer to 4.14 for the concept of calculating erase timeout. If ERASE_SIZE field is set to 0,
this field shall be set to 0.
ERASE_TIMEOUT
Value Definition
00
Erase Time-out Calculation is not supported.
01
1 [sec]
02
2 [sec]
03
3 [sec]
.......
.......
63
63 [sec]
Table 4-49: Erase Timeout Field
• ERASE_OFFSET
This 2-bit field indicates the T
OFFSET
and one of four values can be selected. The erase offset adjusts the
line by moving in parallel on the upper side. Refer to Figure 4-57 and Equation (6) in 4.14. This field is
meaningless if ERASE_SIZE
and ERASE_TIMEOUT fields are set to 0.
ERASE_OFFSET
Value Definition
0h
0 [sec]
1h
1 [sec]
2h
2 [sec]
3h
3 [sec]
Table 4-50: Erase Offset Field