Datasheet

801
SAM9G45 [DATASHEET]
Atmel-6438O-ATARM-SAM9G45-Datasheet_08-Dec-15
35.14.7 HSMCI Block Register
Name: HSMCI_BLKR
Address: 0xFFF80018 (0), 0xFFFD0018 (1)
Access: Read/Write
• BCNT: MMC/SDIO Block Count - SDIO Byte Count
This field determines the number of data byte(s) or block(s) to transfer.
The transfer data type and the authorized values for BCNT field are determined by the TRTYP field in HSMCI_CMDR):
Warning:
In SDIO Byte and Block modes, writing to the 7 last bits of BCNT field is forbidden and may lead to unpredictable
results.
• BLKLEN: Data Block Length
This field determines the size of the data block.
This field is also accessible in the HSMCI Mode Register (HSMCI_MR).
Bits 16 and 17 must be set to 0 if FBYTE is disabled.
Note: In SDIO Byte mode, BLKLEN field is not used.
31 30 29 28 27 26 25 24
BLKLEN
23 22 21 20 19 18 17 16
BLKLEN
15 14 13 12 11 10 9 8
BCNT
76543210
BCNT
Value Name Description
0MULTIPLE
MMC/SDCARD Multiple Block
From 1 to 65635: Value 0 corresponds to an infinite block transfer.
4 BYTE
SDIO Byte
From 1 to 512 bytes: Value 0 corresponds to a 512-byte transfer.
Values from 0x200 to 0xFFFF are forbidden.
5BLOCK
SDIO Block
From 1 to 511 blocks: Value 0 corresponds to an infinite block transfer.
Values from 0x200 to 0xFFFF are forbidden.