UPSD3433EB40U6 STMicroelectronics, UPSD3433EB40U6 Datasheet - Page 128

• Manufacturer Part Number: UPSD3433EB40U6
• Description: MCU 8BIT 8032 128KB FLASH 80TQFP
• Manufacturer: STMicroelectronics
• Series: µPSDr

Specifications of UPSD3433EB40U6

• Core Processor: 8032
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, IrDA, SPI, UART/USART, USB
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 46
• Program Memory Size: 160KB (160K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP, 80-VQFP
• For Use With: 497-5518 - EVAL BOARD RFID READER497-5046 - KIT TOOL FOR ST7/UPSD/STR7 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: 497-5660

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2
C interface
Set I2C clock prescaler to determine fSCL
Set bus START condition sampling
Enable individual I2C interrupt and set priority
Set the Device address for Slave mode
Enable SIOE (as Slave) to return an ACK signal
Master-Transmitter
Disable all interrupts
Set pointer to global data xmit buffer, set count
Set global variables to indicate Master-Xmitter
Disable Master from returning an ACK
Enable I2C SIOE
Transmit Address and R/W bit = 0 to Slave
Enable All Interrupts and go do something else
Master-Receiver
Disable all interrupts
Set pointer to global data recv buffer, set count
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<If busy, then test until not busy>
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<bus transmission begins>
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SFR S1CON.CR[2:0] = desired SCL freq.
SFR S1SETUP[7:0] = number of samples
SFR IEA.I2C = 1
SFR IPA.I2C = 1 if high priority is desired
SFR S1ADR = XXh, desired address
SFR S1CON.AA = 1
SFR IE.EA = 0
*xmit_buf = *pointer to data
buf_length = number of bytes to xmit
I2C_master = 1, I2C_xmitter = 1
SFR S1CON.AA = 0
SFR S1CON.INI1 = 1
Is bus not busy? (SFR S1STA.BBUSY = 0?)
SFR S1DAT[7:0] = Load Slave Address & FEh
SFR S1CON.STA = 1, send START on bus
SFR IE.EA = 1
SFR IE.EA = 0
*recv_buf = *pointer to data
buf_length = number of bytes to recv
uPSD34xx