AT89C51SND2C-7FTUL Atmel, AT89C51SND2C-7FTUL Datasheet - Page 15

• Manufacturer Part Number: AT89C51SND2C-7FTUL
• Description: IC 8051 MCU FLASH 64K MP3 100BGA
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51SND2C-7FTUL

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, IDE/ATAPI, MMC, SPI, UART/USART, USB
• Peripherals: Audio, I²S, MP3, PCM, POR, WDT
• Number Of I /o: 32
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.3 V
• Data Converters: A/D 2x10b; D/A 2x20b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TFBGA
• Data Bus Width: 8 bit
• Data Ram Size: 2.25 KB
• Interface Type: ATAPI, I2S, IDE, SPI, UART, USB
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: AT89C51SND2C7FTUL

5.3.2
4341H–MP3–10/07
PLL Programming
Figure 5-4.
Figure 5-5.
The PLL is programmed using the flow shown in Figure 5-6. As soon as clock generation is
enabled, the user must wait until the lock indicator is set to ensure the clock output is stable. The
PLL clock frequency will depend on MP3 decoder clock and audio interface clock frequencies.
Figure 5-6.
CLOCK
OSC
PLL Block Diagram and Symbol
PLL Filter Connection
PLL Programming Flow
PLLclk
N divider
N6:0
=
OSCclk
---------------------------------------------- -
FILT
N
PLLCON.1
PLLCON.0
PLOCK
PLLEN
+
×
PFLD
Configure Dividers
R9:0 = xxxxxxxxxxb
1
(
Programming
R
N6:0 = xxxxxxb
PLOCK = 1?
PLL Locked?
Enable PLL
PLLRES = 0
PLLEN = 1
+
VSS
1
PLL
)
R
Down
C1
Up
AT8xC51SND2C/MP3B
VSS
R divider
R9:0
PFILT
C2
CHP
Vref
VCO
PLL Clock Symbol
CLOCK
PLL
PLL
Clock
15