AT89C51RE2-SLSUM Atmel, AT89C51RE2-SLSUM Datasheet - Page 151

• Manufacturer Part Number: AT89C51RE2-SLSUM
• Description: MCU 8BIT FLASH 2.7-5.5V 44-PLCC
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51RE2-SLSUM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 60MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 34
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-PLCC
• Package: 44PLCC
• Device Core: 8051
• Family Name: 89C
• Maximum Speed: 40 MHz
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 34
• Interface Type: SPI/TWI/UART
• Number Of Timers: 3
• Processor Series: AT89x
• Core: 8051
• Data Ram Size: 8 KB
• Maximum Clock Frequency: 40 MHz
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: AT89OCD-01
• Minimum Operating Temperature: - 40 C
• Cpu Family: 89C
• Device Core Size: 8b
• Frequency (max): 40MHz
• Total Internal Ram Size: 8KB
• # I/os (max): 34
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 44
• Package Type: PLCC
• For Use With: AT89OCD-01 - USB EMULATOR FOR AT8XC51 MCUAT89STK-11 - KIT STARTER FOR AT89C51RX2
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Functional
Description
Figure 57. SPI Module Block Diagram
Operating Modes
7663E–8051–10/08
SPSCR
SPCON
SPIF
SPR2
SPEN
-
Figure 57 shows a detailed structure of the SPI Module.
The Serial Peripheral Interface can be configured in one of the two modes: Master mode or
Slave mode. The configuration and initialization of the SPI Module is made through two
registers:
•
•
Once the SPI is configured, the data exchange is made using:
•
During an SPI transmission, data is simultaneously transmitted (shifted out serially) and
received (shifted in serially). A serial clock line (SCK) synchronizes shifting and sampling on the
two serial data lines (MOSI and MISO). A Slave Select line (SS) allows individual selection of a
Slave SPI device; Slave devices that are not selected do not interfere with SPI bus activities.
OVR
SSDIS
The Serial Peripheral Control register (SPCON)
The Serial Peripheral Status and Control Register (SPSCR)
The Serial Peripheral DATa register (SPDAT)
SPI
Control
MODF
MSTR
Internal Bus
SPTE
CPOL CPHA
UARTM SPTEIE MODFIE
SPR1
SPR0
SPDAT
Transmit Data Register
Receive Data Register
PERIPH
FCLK
7
Clock
Logic
Shift Register
6
5
4
3
SPI Interrupt
Request
2
1
0
AT89C51RE2
M
S
Pin
Control
Logic
8-bit bus
1-bit signal
MOSI
MISO
SCK
SS
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