UPSD3433E-40T6 STMicroelectronics, UPSD3433E-40T6 Datasheet - Page 136

• Manufacturer Part Number: UPSD3433E-40T6
• Description: MCU 8BIT 8032 128KB FLASH 52TQFP
• Manufacturer: STMicroelectronics
• Series: µPSDr

Specifications of UPSD3433E-40T6

• 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: 35
• 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: 52-TQFP, 52-VQFP
• For Use With: 497-5518 - EVAL BOARD RFID READER
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: 497-4906

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2
C interface
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
Set global variables to indicate Master-Xmitter
Disable Master from returning an ACK
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<If busy, then test until not busy>
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<bus transmission begins>
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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
I2C_master = 1, I2C_xmitter = 0
SFR S1CON.AA = 0
UPSD3422, UPSD3433, UPSD3434, UPSD3454