AT89C5131-S3SIL Atmel, AT89C5131-S3SIL Datasheet - Page 21
AT89C5131-S3SIL
Manufacturer Part Number
AT89C5131-S3SIL
Description
IC 8051 MCU FLASH 32K USB 52PLCC
Manufacturer
Atmel
Series
AT89C513xr
Datasheet
1.AT89C5131-S3SIL.pdf
(176 pages)
Specifications of AT89C5131-S3SIL
Core Processor
C52X2
Core Size
8-Bit
Speed
48MHz
Connectivity
I²C, SPI, UART/USART, USB
Peripherals
LED, POR, PWM, WDT
Number Of I /o
34
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
1.25K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
52-PLCC
For Use With
AT89STK-10 - KIT EVAL APPL MASS STORAGEAT89STK-05 - KIT STARTER FOR AT89C5131
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Data Converters
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PLL Programming
Divider Values
4136B–USB–09/03
The PLL is programmed using the flow shown in Figure 9. As soon as clock generation
is enabled user must wait until the lock indicator is set to ensure the clock output is
stable.
Figure 9. PLL Programming Flow
To generate a 48 MHz clock using the PLL, the divider values have to be configured fol-
lowing the oscillator frequency. The typical divider values are shown in Table 27.
Table 27. Typical Divider Values
Oscillator Frequency
12 MHz
16 MHz
18 MHz
20 MHz
24 MHz
32 MHz
40 MHz
3 MHz
6 MHz
8 MHz
R+1
Configure Dividers
16
12
12
Programming
8
6
4
3
8
2
3
PLL Locked?
N3:0 = xxxxb
R3:0 = xxxxb
LOCK = 1?
Enable PLL
PLLEN = 1
PLL
N+1
10
1
1
1
1
1
3
5
1
2
AT89C5131
PLLDIV
B4h
B9h
F0h
70h
50h
30h
20h
72h
10h
21h
21
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