AT89C5132-RORUL Atmel, AT89C5132-RORUL Datasheet - Page 127

• Manufacturer Part Number: AT89C5132-RORUL
• Description: MCU 8051 FLASH USB 80TQFP
• Manufacturer: Atmel
• Series: AT89C513xr

Specifications of AT89C5132-RORUL

• Core Processor: C52X2
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: IDE/ATAPI, I²C, MMC, PCM, SPI, UART/USART, USB
• Peripherals: I²S, POR, WDT
• Number Of I /o: 44
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 2.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.3 V
• Data Converters: A/D 2x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP, 80-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

19.3.6
4173E–USB–09/07
Slave Mode with Polling Policy
Figure 19-10. Master SPI Interrupt Policy Flows
Figure 19-11 shows the initialization phase and the transfer phase flows using the polling policy.
The transfer format depends on the master controller.
SPIF flag is cleared when reading SPDAT (SPSTA has been read before by the “end of recep-
tion” check).
This policy provides the fastest effective transmission and is well adapted when communicating
at high speed with other Microcontrollers. However, the procedure may be interrupted at any
time by higher priority tasks.
Program CPOL & CPHA
Select Master Mode
Write Data in SPDAT
SPI Initialization
Interrupt Policy
Enable Interrupt
Program SPR2:0
Select Bit Rate
Select Format
Start Transfer
Select Slave
Enable SPI
MSTR = 1
SPEN = 1
ESPI =1
Pn.x = L
Write Data in SPDAT
Get Data Received
Start New Transfer
Service Routine
Disable Interrupt
Last Transfer?
Deselect Slave
SPI Interrupt
Read SPSTA
Read SPDAT
Read Status
Pn.x = H
SPIE = 0
AT89C5132
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