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CY7C64345-32LQXI Datasheet(PDF) 2 Page - Cypress Semiconductor |
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CY7C64345-32LQXI Datasheet(HTML) 2 Page - Cypress Semiconductor |
2 / 32 page CY7C6431x CY7C6434x, CY7C6435x Document Number: 001-12394 Rev *I Page 2 of 32 Functional Overview The enCoRe V family of devices are designed to replace multiple traditional full-speed USB microcontroller system components with one, low cost single-chip programmable component. Communication peripherals (I2C/SPI), a fast CPU, Flash program memory, SRAM data memory, and configurable I/O are included in a range of convenient pinouts. The architecture for this device family, as illustrated in the “enCoRe V Block Diagram” on page 1, consists of two main areas: the CPU core and the system resources. Depending on the enCoRe V package, up to 36 general purpose I/O (GPIO) are also included. This product is an enhanced version of Cypress’s successful full speed-USB peripheral controllers. Enhancements include faster CPU at lower voltage operation, lower current consumption, twice the RAM and Flash, hot-swappable I/Os, I2C hardware address recognition, new very low current sleep mode, and new package options. The enCoRe V Core The enCoRe V Core is a powerful engine that supports a rich instruction set. It encompasses SRAM for data storage, an interrupt controller, sleep and watchdog timers, and IMO (internal main oscillator) and ILO (internal low speed oscillator). The CPU core, called the M8C, is a powerful processor with speeds up to 24 MHz. The M8C is a four-MIPS, 8-bit Harvard architecture microprocessor. System resources provide additional capability, such as a config- urable I2C slave and SPI master-slave communication interface and various system resets supported by the M8C. Full-Speed USB The enCoRe V USB system resource adheres to the USB 2.0 Specification for full speed devices operating at 12 Mb/second with one upstream port and one USB address. enCoRe V USB consists of these components: ■ Serial Interface Engine (SIE) block. ■ PSoC Memory Arbiter (PMA) block. ■ 512 bytes of dedicated SRAM. ■ A full-speed USB Transceiver with internal regulator and two dedicated USB pins. Figure 1. USB Transceiver Regulator At the enCoRe V system level, the full-speed USB system resource interfaces to the rest of the enCoRe V by way of the M8C's register access instructions and to the outside world by way of the two USB pins. The SIE supports nine endpoints including a bidirectional control endpoint (endpoint 0) and eight unidirectional data endpoints (endpoints 1 to 8). The unidirec- tional data endpoints are individually configurable as either IN or OUT. The USB Serial Interface Engine (SIE) allows the enCoRe V device to communicate with the USB host at full speed data rates (12 Mb/s). The SIE simplifies the interface to USB traffic by automatically handling the following USB processing tasks without firmware intervention: ■ Translates the encoded received data and formats the data to be transmitted on the bus. ■ Generates and checks CRCs. Incoming packets failing checksum verification are ignored. ■ Checks addresses. Ignores all transactions not addressed to the device. ■ Sends appropriate ACK/NAK/Stall handshakes. ■ Identifies token type (SETUP, IN, OUT) and sets the appro- priate token bit once a valid token in received. ■ Identifies Start-of-Frame (SOF) and saves the frame count. ■ Sends data to or retrieves data from the USB SRAM, by way of the PSoC Memory Arbiter (PMA). VOLTAGE REGULATOR 5V 3.3V 1.5K 5K PS2 Pull Up DP DM TEN TD PDN RD DPO RSE0 DMO RECEIVERS TRANSMITTER [+] Feedback |
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