AT89C51SND1C-7HTUL Atmel, AT89C51SND1C-7HTUL Datasheet - Page 15

• Manufacturer Part Number: AT89C51SND1C-7HTUL
• Description: IC MCU 64KB FLASH MEM 81-CBGA
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51SND1C-7HTUL

• 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: 44
• 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
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 81-CBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

5.3.2
4109L–8051–02/08
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
VSS
R divider
R9:0
PFILT
C2
CHP
AT8xC51SND1C
Vref
VCO
PLL Clock Symbol
CLOCK
PLL
PLL
Clock
15