AT89C5131-S3SIL Atmel, AT89C5131-S3SIL Datasheet - Page 19
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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Clock Controller
Introduction
Figure 5. Oscillator Block Diagram
Oscillator
4136B–USB–09/03
X1
X2
PLLCON.2
EXT48
PCON.1
PD
The AT89C5131 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 gen-
erated by this controller.
The AT89C5131 X1 and X2 pins are the input and the output of a single-stage on-chip
inverter (see Figure 5) that can be configured with off-chip components as a Pierce
oscillator (see Figure 6). 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:
•
•
•
These clocks are enabled or disabled depending on the power reduction mode as
detailed in Section “Power Management”, page 146.
Two clock sources are available for CPU:
•
•
In order to optimize the power consumption, the oscillator inverter is inactive when the
PLL output is not selected for the USB device.
a clock for the CPU core
a clock for the peripherals which is used to generate the Timers, PCA, WD, and Port
sampling clocks
a clock for the USB controller
Crystal oscillator on X1 and X2 pins: Up to 32 MHz
External 48 MHz clock on X1 pin
PLL
0
1
2
CKCON.0
X2
0
1
PCON.0
IDL
AT89C5131
USB
Clock
Peripheral
Clock
CPU Core
Clock
19
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