AT89C5131-S3SIL Atmel, AT89C5131-S3SIL Datasheet - Page 36
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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Flash Registers and
Memory Map
Hardware Registers
Bootloader Jump Bit (BLJB)
Flash Memory Lock Bits
36
AT89C5131
The AT89C5131 Flash memory uses several registers:
•
•
The only hardware registers of the AT89C5131 is called Hardware Security Byte (HSB).
Table 37. Hardware Security Byte (HSB)
One bit of the HSB, the BLJB bit, is used to force the boot address:
•
•
The three lock bits provide different levels of protection for the on-chip code and data,
when programmed as shown in Table 38.
Number
Bit
5-4
2-0
Hardware registers can only be accessed through the parallel programming modes
which are handled by the parallel programmer.
Software registers are in a special page of the Flash memory which can be
accessed through the API or with the parallel programming modes. This page,
called “Extra Flash Memory”, is not in the internal Flash program memory
addressing space.
When this bit is set the boot address is 0000h.
When this bit is reset the boot address is F400h. By default, this bit is cleared and
the ISP is enabled.
X2
7
6
3
7
Mnemonic Description
OSCON1-0
LB2-0
BLJB
BLJB
Bit
X2
-
6
X2 Mode
Cleared to force X2 mode (6 clocks per instruction)
Set to force X1 mode, Standard Mode (Default).
Bootloader Jump Bit
Set this bit to start the user’s application on next reset at address 0000h.
Cleared this bit to start the bootloader at address F400h (default).
Oscillator Control Bits
These two bits are used to control the oscillator in order to reduce consummation.
OSCON
1
1
0
0
Reserved
User Memory Lock Bits
See Table 38
OSCON1
5
OSCON0
1
0
1
0
OSCON0
4
Description
The oscillator is configured to run from 0 to 32 MHz
The oscillator is configured to run from 0 to 16 MHz
The oscillator is configured to run from 0 to 8 MHz
This configuration shouldn’t be set
3
-
LB2
2
LB1
1
4136B–USB–09/03
LB0
0
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