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LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. Technical brief
3.1.12 MicroSD Interface
card
GD580 supports the MicroSD card interface as external memory card.
MicroSD card has 4-data line, so GD580 uses 4-data lines.
All control and data lines are connected to DB3150.
Cause of the difference between DB3150 and MicroSD card, a level shifter should be added.
Table 3-1-7. MicroSD card Interface
y
Card detection
- When there are no card in MicroSD card socket, MICROSD_DETECT pin is high cause of
an external pull-up.
- If card is inserted in socket, MICROSD_DETECTpin changes Low cause of the
mechanical switch in the socket.
- VDDG_2V85 always supply power.
- If card is removed, APP_GP_MMC_DET pin changes high.
MicroSD card Interface
APP_GP_MMC_DET
Card detection, connected to GPIO of DB3150
MICROSD_CMD_2V7
Command/Response
MICROSD_CLK_2V7
Clock
MICROSD_DAT_2V7
Data line
VDDG_2V85
Supply voltage from AB3000 internal LDO
Figure 3-1-12. MicroSD card and Schematic of MicroSD card Interface
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Содержание GD580
Страница 1: ...Service Manual Model GD580 Internal Use Only Service Manual GD580 Date November 2009 Issue 1 0 ...
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