UPSD3433EB40U6 STMicroelectronics, UPSD3433EB40U6 Datasheet - Page 156

• 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

USB interface
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The USB interrupt priority can be set to low or high. For the best USB response time and to
maximize data transfer times, the USB interrupt should be set to the highest priority (see the
Section 13: Interrupt system
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Table 72.
Bit 7
Bit
USB Reset Interrupt
The host signals a bus reset by driving both D+ and D– low for at least 10ms. When
the uPSD34xx’s SIE detects a reset on the USB, it generates the RST interrupt
request. A USB reset does not reset the CPU nor the USB SIE, nor does it disable the
USB SIE. The interrupt service routine should disable/enable the USB SIE to reset a
portion of the state machine and initialize the USB SIE registers per the application
requirements.
USB Suspend Interrupt
If the uPSD34xx’s SIE detects 3ms of no activity on the bus, it generates the
SUSPEND interrupt request. It also causes the clock to the SIE to shut down to
conserve power.
USB EOP (End of Packet) Interrupt
Every packet sent on the USB includes a signal, called EOP, to indicate the end of the
packet. When an EOP is detected, the SIE generates an EOP interrupt.
USB Resume Interrupt
When USB activity is detected and the SIE is in the suspend state, a RESUME
interrupt is generated. The USB Resume interrupt service routine should clear the
SUSPENDF bit in the UIF0 register if it is set in order to turn the USB SIE clock on.
USB Global Interrupt Enable Register (UIE0)
There are four USB events that are considered to be global in nature, meaning they are
not specific to an endpoint, but apply to the USB bus in general. The four global USB
events include Reset, Suspend, EOP, and Resume.
Each event can be enabled to generate an interrupt using the UIE0 register shown in
Table 72
–
7
6
5
4
3
2
1
0
SUSPEND
RESUMIE
USB global interrupt enable register (UIE0 0E4h, reset value 00h)
Symbol
EOPIE
RSTIE
Bit 6
IE
–
–
–
–
–
Bit 5
R/W
R/W
R/W
R/W
R/W
–
–
–
–
–
for the details on setting the interrupt priority).
Reserved
Reserved
Reserved
Reserved
Enable the USB Reset interrupt
Enable the USB Suspend interrupt
Enable the USB EOP interrupt
Enable the USB Resume interrupt
Bit 4
–
RSTIE
Bit 3
SUSPEND
Definition
Bit 2
IE
EOPIE
Bit 1
uPSD34xx
RESUMIE
Bit 0