AT89LP2052-20SU Atmel, AT89LP2052-20SU Datasheet - Page 48
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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
Figure 19-4. SPI Transfer Format with CPHA = 0
Note:
Figure 19-5. SPI Transfer Format with CPHA = 1
Note:
19.4
48
*Not defined but normally MSB of character just received
*Not defined but normally LSB of previously transmitted character
SPI Pin Configuration
(FOR REFERENCE)
AT89LP2052/LP4052
(FROM MASTER)
SCK (CPOL = 0)
SCK (CPOL = 1)
SS (TO SLAVE)
(FROM SLAVE)
SCK CYCLE #
MOSI
MISO
Before using the Serial Peripheral Interface the four SPI pins – SCK, MISO, MOSI and SS –
must be properly configured for the desired functionality. See
tions” on page
bidirectional or output, with P1.7 and P1.5 set to “1”. MISO should be input-only, or bidirectional
with P1.6 set to “1”. When the SPI is in Slave mode, SCK, MOSI and SS must be configured as
input-only, or as bidirectional with P1.7, P1.6 and P1.4 set to “1”. MISO should be set as bidirec-
tional or output, with P1.6 set to “1”. If all four pins are set as bidirectional and their respectively
port bits are all “1”, it is possible to switch between Master and Slave mode without reconfiguring
the pins.
*
MSB
MSB
1
23. When the SPI is in Master mode, SCK and MOSI must be configured as
2
6
6
3
5
5
4
4
4
5
3
3
6
2
2
Section 15.7 “Port Alternate Func-
7
1
1
8
LSB
LSB
3547J–MICRO–10/09