UPSD3234A-40U6T STMicroelectronics, UPSD3234A-40U6T Datasheet - Page 84

• Manufacturer Part Number: UPSD3234A-40U6T
• Description: IC MCU 8032 64KB FLASH 80TQFP
• Manufacturer: STMicroelectronics
• Series: µPSDr

Specifications of UPSD3234A-40U6T

• Core Processor: 8032
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, UART/USART, USB
• Peripherals: LVR, POR, PWM, WDT
• Number Of I /o: 46
• Program Memory Size: 288KB (288K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 4x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP, 80-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

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2
C interface
I
There are two serial I
The serial port supports the twin line I
(SCLx). Depending on the configuration, the SDA and SCL lines may require pull-up
resistors.
●
●
In both I
●
The system is unique because data transport, clock generation, address recognition and
bus control arbitration are all controlled by hardware.
The I
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●
●
●
These functions are controlled by the SFRs.
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●
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Figure 38. Block diagram of the I
2
C interface
SDA1, SCL1: the serial port line for DDC Protocol
SDA2, SCL2: the serial port line for general I
SDA1 / P4.0, SCL1 / P4.1, SDA2 / P3.6, SCL2 / P3.7
Master transmitter
Master receiver
Slave transmitter
Slave receiver
SxCON: the control of byte handling and the operation of 4 mode.
SxSTA: the contents of its register may also be used as a vector to various service
routines.
SxDAT: data shift register.
SxADR: slave address register. Slave address recognition is performed by On-Chip
H/W.
2
C serial I/O has complete autonomy in byte handling and operates in 4 modes.
2
C interfaces, these lines also function as I/O port lines as follows.
SCLx
SDAx
2
C ports implemented in the UPSD323xx devices.
Arbitration and Sync. Logic
UPSD3234A, UPSD3234BV, UPSD3233B, UPSD3233BV
2
2
C bus serial I/O
7
7
7
7
C-bus, consists of a data line (SDAx) and a clock line
Bus Clock Generator
Control Register
Status Register
Slave Address
Shift Register
2
C bus connection
0
0
0
0
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