Functional Description
MOTOROLA
Multimedia Card/Secure Digital Host Controller Module (MMC/SD)
20-5
20.4.3 Signal Description
The MMC/SD module uses six I/O pins to communicate with external MMC and SD cards.
•
SD_CMD
—Bidirectional command/response signal between the MMC/SD module and the card.
Open-drain for initialization state and push-pull for fast command transfers.
•
SD_CLK
—MMC/SD module to card clock signal (output).
•
SD_DAT [3:0
]—Four bidirectional data signals. When in push-pull mode, one card or the
MMC/SD module can drive each line at a time.
20.4.4 Pin Configuration for the MMC/SD Module
Section 20.4.3, “Signal Description,” lists the pins used by the MMC/SD module. These pins are
multiplexed with other functions on the device and must be configured for MMC/SD module operation.
NOTE:
The user must ensure that the data direction bits in the GPIO are set to the
correct direction for proper operation. See Section 32.5.1, “Data Direction
Registers,” on page 32-9 for details.
20.5 Functional Description
Figure 20-1 on page 20-2 shows a block diagram of the MMC/SD module. The following sections provide
brief functional descriptions of the major system blocks, including the DMA interface, memory controller
(register handler), logic/command controller, and system clock controller.
Table 20-3. Pin Configuration
Pin
Setting
Configuration Procedure
SD_CMD
Primary function of GPIO
Port B [13]
1. Clear bit 13 of Port B GPIO in Use Register (GIUS_B)
2. Clear bit 13 of Port B General Purpose Register (GPR_B)
3. Set bit 13 of Port B Pulling Enable Register (PUEN_B)
SD_CLK
Primary function of GPIO
Port B [12]
1. Clear bit 12 of Port B GPIO in Use Register (GIUS_B)
2. Clear bit 12 of Port B General Purpose Register (GPR_B)
SD_DAT [3]
Primary function of GPIO
Port B [11]
1. Clear bit 11 of Port B GPIO in Use Register (GIUS_B)
2. Clear bit 11 of Port B General Purpose Register (GPR_B)
3. Set bit 11 of Port B Pulling Enable Register (PUEN_B)
SD_DAT [2]
Primary function of GPIO
Port B [10]
1. Clear bit 10 of Port B GPIO in Use Register (GIUS_B)
2. Clear bit 10 of Port B General Purpose Register (GPR_B)
3. Set bit 10 of Port B Pulling Enable Register (PUEN_B)
SD_DAT [1]
Primary function of GPIO
Port B [9]
1. Clear bit 9 of Port B GPIO in Use Register (GIUS_B)
2. Clear bit 9 of Port B General Purpose Register (GPR_B)
3. Set bit 9 of Port B Pulling Enable Register (PUEN_B)
SD_DAT [0]
Primary function of GPIO
Port B [8]
1. Clear bit 8 of Port B GPIO in Use Register (GIUS_B)
2. Clear bit 8 of Port B General Purpose Register (GPR_B)
3. Set bit 8 of Port B Pulling Enable Register (PUEN_B)
Summary of Contents for DragonBall MC9328MX1
Page 68: ...1 12 MC9328MX1 Reference Manual MOTOROLA Introduction ...
Page 86: ...2 18 MC9328MX1 Reference Manual MOTOROLA Signal Descriptions and Pin Assignments ...
Page 116: ...3 30 MC9328MX1 Reference Manual MOTOROLA Memory Map ...
Page 126: ...4 10 MC9328MX1 Reference Manual MOTOROLA ARM920T Processor ...
Page 160: ...8 8 MC9328MX1 Reference Manual MOTOROLA System Control ...
Page 272: ...13 32 MC9328MX1 Reference Manual MOTOROLA DMA Controller ...
Page 281: ...Programming Model MOTOROLA Watchdog Timer Module 14 9 ...
Page 282: ...14 10 MC9328MX1 Reference Manual MOTOROLA Watchdog Timer Module ...
Page 300: ...15 18 MC9328MX1 Reference Manual MOTOROLA Analog Signal Processor ASP ...
Page 438: ...18 16 MC9328MX1 Reference Manual MOTOROLA Serial Peripheral Interface Modules SPI 1 and SPI 2 ...
Page 478: ...19 40 MC9328MX1 Reference Manual MOTOROLA LCD Controller ...
Page 574: ...21 32 MC9328MX1 Reference Manual MOTOROLA Memory Stick Host Controller MSHC Module ...
Page 598: ...23 16 MC9328MX1 Reference Manual MOTOROLA Real Time Clock RTC ...
Page 670: ...24 72 MC9328MX1 Reference Manual MOTOROLA SDRAM Memory Controller ...
Page 726: ...25 56 MC9328MX1 Reference Manual MOTOROLA SmartCard Interface Module SIM ...
Page 736: ...26 10 MC9328MX1 Reference Manual MOTOROLA General Purpose Timers ...
Page 854: ...29 18 MC9328MX1 Reference Manual MOTOROLA I2C Module ...
Page 900: ...30 46 MC9328MX1 Reference Manual MOTOROLA Synchronous Serial Interface SSI ...
Page 942: ...32 26 MC9328MX1 Reference Manual MOTOROLA GPIO Module and I O Multiplexer IOMUX ...