UPSD3234A-40U6T STMicroelectronics, UPSD3234A-40U6T Datasheet - Page 46

• 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: -

Interrupt system
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A low priority interrupt may be interrupted by a high priority interrupt level interrupt. A high
priority interrupt routine cannot be interrupted by any other interrupt source. If two interrupts
of different priority occur simultaneously, the high priority level request is serviced. If
requests of the same priority are received simultaneously, an internal polling sequence
determines which request is serviced. Thus, within each priority level, there is a second
priority structure determined by the polling sequence.
Interrupt enable structure
Each interrupt source can be individually enabled or disabled by setting or clearing a bit in
the interrupt enable special function registers IE and IEA. All interrupt sources can also be
globally disabled by clearing Bit EA in register IE.
Table 19.
Table 20.
Bit
7
6
5
4
3
2
1
0
Priority levels
Description of the IE bits
Timer 2+EXF2
Symbol
2nd USART
1st USART
ET2
ET1
EX1
ET0
EX0
EA
ES
—
Timer 0
Timer 1
Source
DDC
USB
Int0
Int1
I²C
Disable all interrupts:
0: no interrupt with be acknowledged
1: each interrupt source is individually enabled or disabled by setting or
clearing its enable bit
Reserved
Enable Timer 2 Interrupt
Enable USART Interrupt
Enable Timer 1 Interrupt
Enable External Interrupt (Int1)
Enable Timer 0 Interrupt
Enable External Interrupt (Int0)
UPSD3234A, UPSD3234BV, UPSD3233B, UPSD3233BV
Function
Priority with Level
0 (highest)
9 (lowest)
8
1
2
3
4
5
6
7