AT89C5132-RORUL Atmel, AT89C5132-RORUL Datasheet - Page 127
AT89C5132-RORUL
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
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Part Number
Manufacturer
Quantity
Price
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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
127
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