CY8C36_13 Datasheet, PDF (49/129 Pages) Cypress Semiconductor – Programmable System-on-Chip (PSoC®)

PSoC^® 3: CY8C36 Family Datasheet
7.6 USB
PSoC includes a dedicated Full-Speed (12 Mbps) USB 2.0
transceiver supporting all four USB transfer types: control,
interrupt, bulk, and isochronous. PSoC Creator provides full
configuration support. USB interfaces to hosts through two
dedicated USBIO pins, which are detailed in the “I/O System and
Routing” section on page 33.
USB includes the following features:
„ Eight unidirectional data endpoints
„ One bidirectional control endpoint 0 (EP0)
„ Shared 512-byte buffer for the eight data endpoints
„ Dedicated 8-byte buffer for EP0
„ Three memory modes
‡ Manual Memory Management with No DMA Access
‡ Manual Memory Management with Manual DMA Access
‡ Automatic Memory Management with Automatic DMA
Access
„ Internal 3.3-V regulator for transceiver
„ Internal 48-MHz main oscillator mode that auto locks to USB
bus clock, requiring no external crystal for USB (USB equipped
parts only)
„ Interrupts on bus and each endpoint event, with device wakeup
„ USB reset, suspend, and resume operations
„ Bus-powered and self-powered modes
Figure 7-16. USB
Arbiter
512 X 8
SRAM
SIE
(Serial Interface
Engine)
USB
I/O
Interrupts
48 MHz
IMO
External 22 Ω
D+ _Resistors
D–
7.7 Timers, Counters, and PWMs
The Timer/Counter/PWM peripheral is a 16-bit dedicated
peripheral providing three of the most common embedded
peripheral features. As almost all embedded systems use some
combination of timers, counters, and PWMs. Four of them have
been included on this PSoC device family. Additional and more
advanced functionality timers, counters, and PWMs can also be
instantiated in Universal Digital Blocks (UDBs) as required.
PSoC Creator allows you to choose the timer, counter, and PWM
features that they require. The tool set utilizes the most optimal
resources available.
The Timer/Counter/PWM peripheral can select from multiple
clock sources, with input and output signals connected through
the DSI routing. DSI routing allows input and output connections
to any device pin and any internal digital signal accessible
through the DSI. Each of the four instances has a compare
output, terminal count output (optional complementary compare
output), and programmable interrupt request line. The
Timer/Counter/PWMs are configurable as free running, one shot,
or Enable input controlled. The peripheral has timer reset and
capture inputs, and a kill input for control of the comparator
outputs. The peripheral supports full 16-bit capture.
Timer/Counter/PWM features include:
„ 16-bit Timer/Counter/PWM (down count only)
„ Selectable clock source
„ PWM comparator (configurable for LT, LTE, EQ, GTE, GT)
„ Period reload on start, reset, and terminal count
„ Interrupt on terminal count, compare true, or capture
„ Dynamic counter reads
„ Timer capture mode
„ Count while enable signal is asserted mode
„ Free run mode
„ One Shot mode (stop at end of period)
„ Complementary PWM outputs with deadband
„ PWM output kill
Figure 7-17. Timer/Counter/PWM
Clock
Reset
Enable
Capture
Kill
Timer / Counter /
PWM 16-bit
IRQ
TC / Compare!
Compare
Document Number: 001-53413 Rev. *Q
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