UPSD3454E-40T6 STMicroelectronics, UPSD3454E-40T6 Datasheet - Page 140
UPSD3454E-40T6
Manufacturer Part Number
UPSD3454E-40T6
Description
MCU 8BIT 8032 256K FLASH 52-TQFP
Manufacturer
STMicroelectronics
Series
µPSDr
Datasheet
1.UPSD3422EV-40U6.pdf
(300 pages)
Specifications of UPSD3454E-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
288KB (288K x 8)
Program Memory Type
FLASH
Ram Size
32K 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
-
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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
UPSD3422, UPSD3433, UPSD3434, UPSD3454
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