KLM4G1EEHM-B101 Просмотр технического описания (PDF) - Samsung

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Компоненты Описание

производитель

KLM4G1EEHM-B101

SAMSUNG moviNAND

Samsung 

KLMxGxxEHx

datasheet

Draft Rev. 0.0

moviNAND

4.1.3 Change boot partition size

Initial boot partition size in moviNAND is set to zero. However, the boot partition size is allowed to be changed by user. Boot partition size changing

sequence is following the sequence Figure 4-2 below. Argument of the third CMD62 can be set boot partition size. It can be calculated by this equation.

Argument (Boot Size) =(Number of Super Block for boot partition) / 2

For example, if user wants 10 super blocks for boot partition, argument of third CMD62 should be 0x5.

Detail values of moviNAND are referred to below Table.

After setting the boot partition size, all of data in the moviNAND is removed. And the value of EXT_CSD [227:226] and SEC_COUNT is automatically

changing. So user should be careful changing boot partition size.

Command 62 (ARG: 0xEFAC62EC)

Command 62 (ARG: 0x00CBAEA7)

Command 62 (ARG: Boot Size)

Wait Busy Clear

Density

1GB

2GB

8GB

16GB

Figure 6. Boot Partition Size Changing Sequence

Super Block Size

1MB

1MB

4MB

4MB

MAX Boot Partition Size

256MB

256MB

1024MB

1024MB

Max argument value

128

128

128

128

4.1.4 Timing in Boot Mode

SAMSUNG moviNAND needs Min.50ms time(tDELAY) to start boot mode right after power-up. This time(tDELAY) includes normal boot mode as well as

alternative boot mode.

If host does not wait the time(tDELAY) for boot mode , hosts may experience timeout because tBA would be out of spec.

VDD

VDDF

CLK

CMD

CMD1 RESP CMD2 RESP CMD3 RESP

DAT[0]

S 010 E

tBA

tDELAY Max

50ms

Min

50ms

tBD

1 sec Max

S 512bytes E

+CRC

S 512bytes E

+CRC

Boot terminated

Min 8 clocks + 48 clocks = 56 clocks required from

CMD signal high to next MMC command.

Figure 7. MultiMediaCard state diagram & timing (boot mode)

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