ST72651AR6 STMicroelectronics, ST72651AR6 Datasheet - Page 66

• Manufacturer Part Number: ST72651AR6
• Description: LOW-POWER, FULL-SPEED USB 8-BIT MCU WITH 32K FLASH, 5K RAM, FLASH CARD I/F, TIMER, PWM, ADC, I2C, SPI
• Manufacturer: STMicroelectronics

Specifications of ST72651AR6

• Dual Supply Management: analog voltage detector on the USB power line to enable smart power switching from USB power to battery (on E suffix devices).
• Programmable Internal Voltage Regulator For Memory Cards (2.8v To 3.5v) Supplying: Flash Card I/O lines (voltage shifting)
• 5 Usb Endpoints: 1 control endpoint
• Dtc (data Transfer Coprocessor): Universal Serial/Parallel communications interface, with software plug-ins for current and future protocol standards

ST72651AR6
USB INTERFACE (Cont’d)
11.3.5 Low Power modes
11.3.6 Interrupts
Note: The USB end of suspend interrupt event is connected to a single interrupt vector (USB ESUSP) with
the exit from halt capability (wake-up). All the other interrupt events are connected to another interrupt
vector: USB interrupt (USB). They generate an interrupt if the corresponding enable control bit is set and
the interrupt mask bits (I0, I1) in CC register are reset (RIM instruction).
66/161
1
Mode
WAIT
HALT
No effect on USB.
USB interrupt events cause the device to exit from WAIT mode.
USB registers are frozen.
In halt mode, the USB is inactive. USB operations resume when the MCU is woken up by an interrupt with
“exit from halt capability” or by an event on the USB line in case of suspend. This event will generate an
ESUSP interrupt which will wake-up from halt mode.
Suspend Mode Request
End of SUSPend mode.
Correct TRansfer
Interrupt Event
Setup OVeRrun
Start Of Frame
USB RESET
ERROR
Doc ID 7215 Rev 4
Description
Event Flag
ESUSP
RESET
SOVR
SUSP
CTR
ERR
SOF
Enable Con-
ESUSPM
RESETM
SOVRM
SUSPM
trol Bit
ERRM
SOFM
CTRM
Exit From
Wait
Yes
Yes
Yes
Yes
Yes
Yes
Yes
From
Exit
Halt
Yes
No
No
No
No
No
No