K60P100M100SF2RM Datasheet, PDF (1618/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Memory map and register definition
52.4.23 MMC Boot Register (SDHC_MMCBOOT)
This register contains the MMC fast boot control register.
Address: SDHC_MMCBOOT is 400B_1000h base + C4h offset = 400B_10C4h
Bit 31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
R
BOOTBLKCNT
W
Reset 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit 15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
0
W
DTOCVACK
Reset 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
SDHC_MMCBOOT field descriptions
Field
Description
31–16
The value defines the stop at block gap value of automatic mode. When received card block cnt is equal
BOOTBLKCNT to BOOTBLKCNT and AUTOSABGEN is 1, then stop at block gap.
15–8
Reserved
This read-only field is reserved and always has the value zero.
7
When boot, enable auto stop at block gap function. This function will be triggered, and host will stop at
AUTOSABGEN block gap when received card block cnt is equal to BOOTBLKCNT.
6
BOOTEN
Boot mode enable
0 Fast boot disable
1 Fast boot enable
5
BOOTMODE
Boot mode select
0 Normal boot
1 Alternative boot
4
BOOTACK
Boot ack mode select
0 No ack
1 Ack
3–0
DTOCVACK
Boot ACK time out counter value.
0000b
0001b
0010b
SDCLK x 2^8
SDCLK x 2^9
SDCLK x 2^10
Table continues on the next page...
1618
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.