AT89C5130A-RDRUM Atmel, AT89C5130A-RDRUM Datasheet - Page 29

• Manufacturer Part Number: AT89C5130A-RDRUM
• Description: MCU 8051 16K FLASH USB 64-VQFP
• Manufacturer: Atmel
• Series: AT89C513xr

Specifications of AT89C5130A-RDRUM

• 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: 16KB (16K 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: 64-TQFP, 64-VQFP
• Processor Series: AT89x
• Core: 8051
• Data Bus Width: 8 bit
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: AT89STK-05
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -

8. Program/Code Memory
8.1
8.1.1
4337K–USB–04/08
External Code Memory Access
Memory Interface
The AT89C5130A/31A-M implement 16/ 32 Kbytes of on-chip program/code memory. Figure 8-
1 shows the split of internal and external program/code memory spaces depending on the
product.
The Flash memory increases EPROM and ROM functionality by in-circuit electrical erasure and
programming. Thanks to the internal charge pump, the high voltage needed for programming or
erasing Flash cells is generated on-chip using the standard V
ory can be programmed using only one voltage and allows In- application Software
Programming commonly known as IAP. Hardware programming mode is also available using
specific programming tool.
Figure 8-1.
Note:
The external memory interface comprises the external bus (Port 0 and Port 2) as well as the bus
control signals (PSEN, and ALE).
Figure 8-2 shows the structure of the external address bus. P0 carries address A7:0 while P2
carries address A15:8. Data D7:0 is multiplexed with A7:0 on P0. Table 8-1 describes the exter-
nal memory interface signals.
If the program executes exclusively from on-chip code memory (not from external memory),
beware of executing code from the upper byte of on-chip memory (3FFFh/7FFFh) and thereby
disrupting I/O Ports 0 and 2 due to external prefetch. Fetching code constant from this location
does not affect Ports 0 and 2.
FFFFh
3FFFh
4000h
0000h
Program/Code Memory Organization
AT89C5130A
External Code
48 Kbytes
16 Kbytes
Flash
AT89C5130A/31A-M
DD
FFFFh
7FFFh
8000h
0000h
voltage. Thus, the Flash Mem-
AT89C5131A
External Code
32 Kbytes
32 Kbytes
Flash
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