AT89C5131-S3SIL Atmel, AT89C5131-S3SIL Datasheet - Page 46
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
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On-chip Expanded
RAM (ERAM)
Figure 22. Internal and External Data Memory Address
46
AT89C5131
0FFh or 3FFh
00
ERAM
The AT89C5131 provides additional Bytes of random access memory (RAM) space for
increased data parameter handling and high level language usage.
AT89C5131 devices have expanded RAM in external data space; maximum size and
location are described in Table 45.
Table 45. Description of Expanded RAM
The AT89C5131 has on-chip data memory that is mapped into the following four sepa-
rate segments.
1. The Lower 128 bytes of RAM (addresses 00h to 7Fh) are directly and indirectly
2. The Upper 128 bytes of RAM (addresses 80h to FFh) are indirectly addressable
3. The Special Function Registers, SFRs, (addresses 80h to FFh) are directly
4. The expanded RAM bytes are indirectly accessed by MOVX instructions, and
The lower 128 bytes can be accessed by either direct or indirect addressing. The Upper
128 bytes can be accessed by indirect addressing only. The Upper 128 bytes occupy
the same address space as the SFR. That means they have the same address, but are
physically separate from SFR space.
Part Number
AT89C5131
addressable.
only.
addressable only.
with the EXTRAM bit cleared in the AUXR register (see Table 45)
0FFh
80h
7Fh
00
indirect accesses
direct or indirect
128 bytes
128 bytes
accesses
Internal
Internal
Upper
Lower
RAM
RAM
ERAM Size
1024
0FFh
80h
direct accesses
Function
Register
Special
00FFh up to 03FFh
Start
00h
0FFFFh
0000
Address
External
Memory
Data
3FFh
End
4136B–USB–09/03
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