UPSD3433EB40U6 STMicroelectronics, UPSD3433EB40U6 Datasheet - Page 132

• 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
Is this the next to last byte to receive from Slave?
Else If mode is Slave-Transmitter:
Is this Intr from SIOE detecting a STOP on bus?
ACK recvd from Master? (status.ACK_RESP=0?)
Else If mode is Slave-Receiver:
Is this Intr from SIOE detecting a STOP on bus?
Determine if this Interrupt is from receiving an address or a data
byte from a Master.
Is (S1CON.ADDR = 1 and S1CON.AA =1)?
Determine if R/W bit indicates transmit or receive.
–
–
–
–
–
–
–
–
–
–
–
–
–
If this is the next to last byte, do not allow Master to ACK
on next interrupt.
S1CON.AA = 0, don’t let Master return ACK
Exit ISR, now ready to recv last byte from Slv
If this is not next to last byte, let Master send ACK to
Slave
<S1CON.AA is already 1>
Exit ISR, ready to recv more bytes from Slave
If Yes, a STOP was detected:
S1DAT = dummy, write to release bus
Exit ISR, Master needs no more data bytes
If No, a STOP was not detected, continue:
If No, an ACK was not received:
S1DAT = dummy, write to release bus
Exit ISR, Master needs no more data bytes
If Yes, ACK was received, then continue:
S1DAT = xmit_buf[buffer_index], transmit byte
Exit ISR, transmit next byte on next interrupt
If Yes, a STOP was detected:
recv_buf[buffer_index] = S1DAT, get last byte
Exit ISR, Master has sent last byte
If No, a STOP was not detected, continue:
If No, intr is from receiving data, goto C:
If Yes, intr is from an address, continue:
slave_is_adressed = 1, local variable set true
<indicates Master selected this slave>
S1CON.ADDR = 0, clear address match flag
uPSD34xx