AT89LP2052-20SU Atmel, AT89LP2052-20SU Datasheet - Page 63
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AT89LP2052-20SU
Manufacturer Part Number
AT89LP2052-20SU
Description
IC 8051 MCU FLASH 2K 20SOIC
Manufacturer
Atmel
Series
89LPr
Datasheet
1.AT89LP2052-20PU.pdf
(94 pages)
Specifications of AT89LP2052-20SU
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
2KB (2K 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-SOIC (7.5mm Width)
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
SMD/SMT
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
AT89ISP
Minimum Operating Temperature
- 40 C
Package
20SOIC W
Device Core
8051
Family Name
AT89
Maximum Speed
20 MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Lead Free Status / Rohs Status
Details
23.4.5
3547J–MICRO–10/09
Load Code Page Buffer
Function:
Usage:
Figure 23-9. Load Page Buffer Sequence
Note:
• Loads 1 page (1 to 32 bytes) of data into the temporary page buffer but does not start
• Use for interruptible loads or loading non-contiguous bytes to a page.
• The byte address (offset in page) is initialized to bits [4:0] of the low address byte. One byte
• The Load Page Buffer command needs to be followed by a write command as the internal
• Clears Bit 3 of the status byte to signal that the buffer contains data.
1. Bring CS (P3.2) low.
2. Drive P1 to AAh and pulse XTAL1 high.
3. Drive P1 to 51h and pulse XTAL1 high.
4. Drive P1 to 00h and pulse XTAL1 high.
5. Drive P1 with bits [4:0] of address and pulse XTAL1 high.
6. To load data bytes, drive data on P1 and pulse XTAL1 high to load one byte and incre-
7. Bring CS high.
programming.
of data is loaded from P1 for the current address by the positive edge of a XTAL1 pulse. The
internal address is incremented by one on the negative edge of the XTAL1 pulse. The
address will wrap around to the 1st byte of the page when incremented past 31, however
previously loaded bytes should not be re-loaded.
buffer is not cleared until either the next write has completed or the programming session
ends.
XTAL1
ment to the next address. Repeat for additional bytes. Only 1-32 bytes may be
programmed at one time, including any bytes loaded by a previous load page buffer
command. Bytes should not be loaded more than once.
CS
P1
The waveform on this page is not to scale.
AAh
51h
00h
000bbbbb
AT89LP2052/LP4052
DIN 0
DIN 1
DIN n
63