AT83C51SND1C_03 ATMEL [ATMEL Corporation], AT83C51SND1C_03 Datasheet - Page 115

• Manufacturer Part Number: AT83C51SND1C_03
• Description: Single-Chip Flash Microcontroller with MP3 Decoder and Human Interface
• Manufacturer: ATMEL [ATMEL Corporation]

Figure 79. MMC Clock Generator and Symbol
Figure 80. Configuration Flow
4109E–8051–06/03
CLOCK
OSC
MMCON2.7
MMCEN
As soon as MMCEN bit in MMCON2 is set, the MMC controller receives its system
clock. The MMC command and data clock is generated on MCLK output and sent to the
command line and data line controllers. Figure 80 shows the MMC controller configura-
tion flow.
As exposed in Section “Clock Control”, page 113, MMCD7:0 bits can be used to dynam-
ically increase or reduce the MMC clock.
MMCD7:0
MMCLK
Configure MMC Clock
MMC Controller
Configuration
MMCLK = XXh
MMCEN = 1
FLOWC = 0
Controller Clock
MMC Clock
MMCclk
MMC Clock Symbol
AT8xC51SND1C
CLOCK
MMC
=
---------------------------- -
MMCD
OSCclk
+
1
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