UPSD3433EB40U6 STMicroelectronics, UPSD3433EB40U6 Datasheet - Page 92

• 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

Standard 8032 timer/counters
20.6.1
20.6.2
Note:
92/293
Capture mode
In Capture Mode there are two options which are selected by the bit EXEN2 in T2CON.
Figure 28 on page 97
If EXEN2 = 0, then Timer 2 is a 16-bit timer if C/T2 = 0, or it is a 16-bit counter if C/T2 = 1,
either of which sets the interrupt flag bit TF2 upon overflow.
If EXEN2 = 1, then Timer 2 still does the above, but with the added feature that a 1-to-0
transition at external input pin T2X causes the current value in the Timer 2 registers, TL2
and TH2, to be captured into Registers RCAP2L and RCAP2H, respectively. In addition, the
transition at T2X causes interrupt flag bit EXF2 in T2CON to be set. Either flag TF2 or EXF2
will generate an interrupt and the MCU must read both flags to determine the cause. Flags
TF2 and EXF2 are not automatically cleared by hardware, so the firmware servicing the
interrupt must clear the flag(s) upon exit of the interrupt service routine.
Auto-reload mode
In the Auto-reload Mode, there are again two options, which are selected by the bit EXEN2
in T2CON.
If EXEN2 = 0, then when Timer 2 counts up and rolls over from FFFFh it not only sets the
interrupt flag TF2, but also causes the Timer 2 registers to be reloaded with the 16-bit value
contained in Registers RCAP2L and RCAP2H, which are preset with firmware.
If EXEN2 = 1, then Timer 2 still does the above, but with the added feature that a 1-to-0
transition at external input T2X will also trigger the 16-bit reload and set the interrupt flag
EXF2. Again, firmware servicing the interrupt must read both TF2 and EXF2 to determine
the cause, and clear the flag(s) upon exit.
The uPSD34xx does not support selectable up/down counting in Auto-reload mode (this
feature was an extension to the original 8032 architecture).
Figure 29 on page 97
illustrates Capture mode.
shows Auto-reload mode.
uPSD34xx