AT89C5122D-PSTUM Atmel, AT89C5122D-PSTUM Datasheet - Page 141

• Manufacturer Part Number: AT89C5122D-PSTUM
• Description: IC 8051 MCU FLASH 32K 64QFN
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C5122D-PSTUM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: SmartCard, SPI, UART/USART, USB
• Peripherals: LED, POR, WDT
• Number Of I /o: 46
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-QFN
• For Use With: AT89STK-10 - KIT EVAL APPL MASS STORAGEAT89STK-03 - KIT STARTER FOR MCU AT8XC5122/23
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

Registers
Serial Peripheral Control
Register (SPCON)
4202F–SCR–07/2008
Mode Fault flag, MODF: This bit becomes set to indicate that the level on the SS is
inconsistent with the mode of the SPI. MODF with SSDIS reset, generates receiver/error
CPU interrupt requests.
Figure 88 gives a logical view of the above statements.
Figure 88. SPI Interrupt Requests Generation
There are three registers in the module that provide control, status and data storage
functions. These registers are described in the following paragraphs.
The Serial Peripheral Control Register does the following:
•
•
•
•
•
Selects one of the Master clock rates
Configures the SPI module as Master or Slave
Selects serial clock polarity and phase
Enables the SPI module
Frees the SS pin for a general-purpose
SPIF
MODF
SSDIS
CPU Interrupt Request
SPI Transmitter
SPI Receiver/error
CPU Interrupt Request
AT83R5122, AT8xC5122/23
CPU Interrupt Request
SPI
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