AT89LP4052-20PU Atmel, AT89LP4052-20PU Datasheet - Page 5

• Manufacturer Part Number: AT89LP4052-20PU
• Description: IC 8051 MCU FLASH 4K 20DIP
• Manufacturer: Atmel
• Series: 89LPr

Specifications of AT89LP4052-20PU

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 15
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-DIP (0.300", 7.62mm)
• Processor Series: AT89x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: UART, SPI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 15
• Number Of Timers: 2
• Operating Supply Voltage: 2.4 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: AT89ISP
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

5.2
3547J–MICRO–10/09
Data Memory
Figure 5-1.
The AT89LP2052/LP4052 contains 256 bytes of general SRAM data memory plus 128 bytes of
I/O memory. The lower 128 bytes of data memory may be accessed through both direct and
indirect addressing. The upper 128 bytes of data memory and the 128 bytes of I/O memory
share the same address space (see
be accessed using indirect addressing. The I/O memory can only be accessed through direct
addressing and contains the Special Function Registers (SFRs). The lowest 32 bytes of data
memory are grouped into 4 banks of 8 registers each. The RS0 and RS1 bits (PSW.3 and
PSW.4) select which register bank is in use. Instructions using register addressing will only
access the currently specified bank. The AT89LP2052/LP4052 does not support external data
memory.
Figure 5-2.
Upper
Lower
128
128
FFH
7FH
80H
0
0000
07FF
Program Memory Map
Data Memory Map
By Direct and
Addressing
Addressing
By Indirect
Accessible
Accessible
Program Memory
Indirect
Only
AT89LP2052
Figure
5-2). The upper 128 bytes of data memory may only
Addressing
Accessible
By Direct
0000
0FFF
Special
Function
Registers
AT89LP2052/LP4052
Program Memory
AT89LP4052
FFH
80H
Ports
Status and
Control Bits
Timers
Registers
Stack Pointer
Accumulator
(Etc.)
5