AT89LP52-20MU Atmel, AT89LP52-20MU Datasheet - Page 10

• Manufacturer Part Number: AT89LP52-20MU
• Description: IC MCU 8051 8K FLASH SPI 44VQFN
• Manufacturer: Atmel
• Series: 89LPr

Specifications of AT89LP52-20MU

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 36
• Program Memory Size: 8KB (8K 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: 44-VFQFN Exposed Pad
• Processor Series: AT89x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: Serial
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 36
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

3. Memory Organization
3.1
10
Program Memory
AT89LP51/52 - Preliminary
The AT89LP51/52 uses a Harvard Architecture with separate address spaces for program and
data memory. The program memory has a regular linear address space with support for 64K
bytes of directly addressable application code. The data memory has 256 bytes of internal RAM
and 128 bytes of Special Function Register I/O space. The AT89LP51/52 supports up to 64K
bytes of external data memory, with portions of the external data memory space implemented on
chip as nonvolatile Flash data memory. External program memory is supported for addresses
above 8K. The memory address spaces of the AT89LP51/52 are listed in
Table 3-1.
The AT89LP51/52 contains 4K/8K bytes of on-chip In-System Programmable Flash memory for
program storage, plus support for up to 60K/56K bytes of external program memory. The Flash
memory has an endurance of at least 10,000 write/erase cycles and a minimum data retention
time of 10 years. The reset and interrupt vectors are located within the first 83 bytes of program
memory (refer to
program memory address space for access by the MOVC instruction. A map of the
AT89LP51/52 program memory is shown in
Figure 3-1.
Name
DATA
IDATA
SFR
FDATA
XDATA
CODE
XCODE
SIG
0100
0000
1000
0000
01FF
007F
0FFF
FFFF
AT89LP51/52 Memory Address Spaces
Program Memory Map
Table 9-1 on page
Description
Directly addressable internal RAM
Indirectly addressable internal RAM and stack space
Directly addressable I/O register space
On-chip nonvolatile Flash data memory
External data memory
On-chip nonvolatile Flash program memory
External program memory
On-chip nonvolatile Flash signature array
Atmel Signature Array
User Signature Array
External Program
Internal Program
(XCODE: 60KB)
(CODE: 4KB)
AT89LP51
Memory
Memory
37). Constant tables can be allocated within the entire 64K
01FF
0100
007F
0000
2000
0000
FFFF
1FFF
Figure
Atmel Signature Array
User Signature Array
3-1.
External Program
Internal Program
(XCODE: 56KB)
(CODE: 8KB)
AT89LP52
Memory
Memory
0000H–0FFFH (AT89LP51)
0000H–1FFFH (AT89LP52)
2000H–FFFFH (AT89LP51)
1000H–FFFFH (AT89LP52)
Table
0100H–FFFFH
0000H–00FFH
0000H–01FFH
SIGEN=1
SIGEN=0
00H–7FH
00H–FFH
80H–FFH
Range
3-1.
3709B–MICRO–12/10