AT89LP6440-20PU Atmel, AT89LP6440-20PU Datasheet - Page 20
AT89LP6440-20PU
Manufacturer Part Number
AT89LP6440-20PU
Description
MCU 8051 64K FLASH ISP 40PDIP
Manufacturer
Atmel
Series
89LPr
Datasheet
1.AT89LP6440-20MU.pdf
(194 pages)
Specifications of AT89LP6440-20PU
Core Processor
8051
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
38
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Eeprom Size
8K x 8
Ram Size
4.25K x 8
Voltage - Supply (vcc/vdd)
2.4 V ~ 3.6 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
40-DIP (0.600", 15.24mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- Current page: 20 of 194
- Download datasheet (6Mb)
3.5
20
In-Application Programming (IAP)
AT89LP6440 - Preliminary
separate copies of SP for use with each stack space. Interrupts should be disabled while swap-
ping copies of SP in such an application to prevent illegal stack accesses.
All interrupt calls and PUSH, POP, ACALL, LCALL, RET and RETI instructions will incur a one
or two-cycle penalty while the extended stack is enabled, depending on the number of stack
access in each instruction. The extended stack may only exist within the internal EDATA space;
it cannot be placed in XDATA. The stack will continue to use EDATA even if EDATA is disabled
by setting EXRAM = 1.
Figure 3-14. Stack Configurations
The AT89LP6440 supports In-Application Programming (IAP), allowing the program memory to
be modified during execution. IAP can be used to modify the user application on the fly or to use
program memory for nonvolatile data storage. The same page structure write protocol for
FDATA also applies to IAP (See
always placed in idle while modifying the program memory. When the write completes, the CPU
will continue executing with the instruction after the MOVX @DPTR,A instruction that started the
write.
To enable access to the program memory, the IAP bit (MEMCON.7) must be set to one and the
IAP User Fuse must be enabled. The IAP User Fuse can disable all IAP operations. When this
fuse is disabled, the IAP bit will be forced to 0. While IAP is enabled, all MOVX @DPTR instruc-
tions will access the CODE space instead of EDATA/FDATA/XDATA. IAP also allows
reprogramming of the User Signature Array when SIGEN = 1. The IAP access settings are sum-
marized in
Table 3-5.
IAP
0
0
0
0
1
1
Table
SIGEN
IAP Access Settings
0
0
1
1
0
1
3-5.
7
DMEN
SP
X
X
0
1
0
1
0
FFh
00h
XSTK = 0
IDATA
Section 3.3.3.1 “Write Protocol” on page
(256)
EDATA (0000–0FFFH)
FDATA (1000–2FFFH)
EDATA (0000–0FFFH)
FDATA (1000–2FFFH)
CODE (0000–FFFFH)
SIG (0000–01FFH)
MOVX @DPTR
3
SPX
0
7
SP
0
FFFh
00h
XSTK = 1
EDATA
(4K)
CODE (0000–FFFFH)
CODE (0000–FFFFH)
CODE (0000–FFFFH)
SIG (0000–01FFH)
SIG (0000–01FFH)
SIG (0000–01FFH)
MOVC @DPTR
13). The CPU is
3706A–MICRO–9/09
Related parts for AT89LP6440-20PU
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
DEV KIT FOR AVR/AVR32
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
High-performance EE PLD
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
8-bit Flash Microcontroller
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
2-Wire Serial EEPROM
Manufacturer:
ATMEL Corporation
Datasheet: