AT89C5131A-S3SIM Atmel, AT89C5131A-S3SIM Datasheet - Page 14
![IC 8051 MCU FLASH 32K USB 52PLCC](/photos/12/13/121324/453-52-plcc_sml.jpg)
AT89C5131A-S3SIM
Manufacturer Part Number
AT89C5131A-S3SIM
Description
IC 8051 MCU FLASH 32K USB 52PLCC
Manufacturer
Atmel
Series
AT89C513xr
Datasheet
1.AT89C5130A-PUTUM.pdf
(188 pages)
Specifications of AT89C5131A-S3SIM
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)
2.7 V ~ 5.5 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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5. Clock Controller
5.1
Figure 5-1.
5.2
14
Introduction
Oscillator
AT89C5130A/31A-M
X1
X2
Oscillator Block Diagram
PLLCON.2
EXT48
The AT89C5130A/31A-M clock controller is based on an on-chip oscillator feeding an on-chip
Phase Lock Loop (PLL). All the internal clocks to the peripherals and CPU core are generated
by this controller.
The AT89C5130A/31A-M X1 and X2 pins are the input and the output of a single-stage on-chip
inverter (see Figure 5-1) that can be configured with off-chip components as a Pierce oscillator
(see Figure 5-2). Value of capacitors and crystal characteristics are detailed in the section “DC
Characteristics”.
The X1 pin can also be used as input for an external 48 MHz clock.
The clock controller outputs three different clocks as shown in Figure 5-1:
These clocks are enabled or disabled depending on the power reduction mode as detailed in
Section “Power Management”, page 155.
Two types of clock sources can be used for CPU:
PCON.1
• a clock for the CPU core
• a clock for the peripherals which is used to generate the Timers, PCA, WD, and Port
• a clock for the USB controller
• Crystal oscillator on X1 and X2 pins: Up to 32 MHz (Amplifier Bandwidth)
• External clock on X1 pin: Up to 48MHz
PD
sampling clocks
PLL
0
1
÷
2
CKCON.0
X2
0
1
PCON.0
IDL
USB
Clock
Peripheral
Clock
CPU Core
Clock
4337K–USB–04/08
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