AT89C5131-S3SIL Atmel, AT89C5131-S3SIL Datasheet - Page 39
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 Memory Status
Figure 19. Flash Memory Possible Contents
Memory Organization
4136B–USB–09/03
0000h
7FFFh AT89C5131
Default
Virgin
After ISP
Application
The two lock bits provide different levels of protection for the on-chip code and data,
when programmed as shown to Table 41.
Table 41. Program Lock Bits of the SSB
Notes:
AT89C5131 parts are delivered with the ISP boot in the Flash memory. After ISP or par-
allel programming, the possible contents of the Flash memory are summarized in Figure
19:
In the AT89C5131, the lowest 16K or 32K of the 64 Kbyte program memory address
space is filled by internal Flash.
When the EA is pin high, the processor fetches instructions from internal program Flash.
Bus expansion for accessing program memory from 16K or 32K upward is automatic
since external instruction fetches occur automatically when the program counter
exceeds 3FFFh (16K) or 7FFFh (32K). If the EA pin is tied low, all program memory
fetches are from external memory. If all storage is on chip, then byte location 3FFFh
(16K) or 7FFFh (32K) should be left vacant to prevent and undesired pre-fetch from
external program memory address 4000h (16K) or 8000h (32K).
Security
Level
Program Lock Bits
1
2
3
1. U: unprogrammed or "one" level.
2. P: programmed or “zero” level.
3. X: don’t care
4. WARNING: Security level 2 and 3 should only be programmed after Flash and code
verification.
LB0
U
P
X
Dedicated
ISP
After ISP
Application
Virgin
LB1
U
U
P
or
Protection Description
No program lock features enabled.
ISP programming of the Flash is disabled.
Same as 2, also verify through ISP programming interface is disabled.
After parallel
programming
Application
After parallel
programming
Dedicated
ISP
Application
Virgin
or
After parallel
programming
Application
AT89C5131
Virgin
or
39
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