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CY8C28643-24LTXIT Datasheet(PDF) 7 Page - Cypress Semiconductor |
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CY8C28643-24LTXIT Datasheet(HTML) 7 Page - Cypress Semiconductor |
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7 / 78 page  CY8C28243, CY8C28403, CY8C28413 CY8C28433, CY8C28445, CY8C28452 CY8C28513, CY8C28533, CY8C28545 CY8C28623, CY8C28643, CY8C28645 Document Number: 001-48111 Rev. *K Page 7 of 78 System Resources System Resources, some of which are listed in the previous sections, provide additional capability useful to complete systems. Additional resources include a multiplier, multiple decimators, switch mode pump, low voltage detection, and power on reset. Statements describing the merits of each system resource follow: ■ Digital clock dividers provide three customizable clock frequencies for use in applications. The clocks can be routed to both the digital and analog systems. Additional clocks can be generated using digital PSoC blocks as clock dividers. ■ Multiply accumulate (MAC) provides fast 8-bit multiplier with 32-bit accumulate, to assist in general math and digital filters. ■ Up to four decimators provide custom hardware filters for digital signal processing applications such as Delta-Sigma ADCs and CapSense capacitive sensor measurement. ■ Up to two I2C resources provide 0 to 400 kHz communication over two wires. Slave, master, and multi-master modes are all supported. I2C resources have hardware address detection capability. ■ Low Voltage Detection (LVD) interrupts can signal the appli- cation of falling voltage levels, while the advanced POR (Power On Reset) circuit eliminates the need for a system supervisor. ■ An internal 1.3 V reference provides an absolute reference for the analog system, including ADCs and DACs. ■ An integrated switch mode pump (SMP) generates normal operating voltages from a single 1.5 V battery cell, providing a low cost boost converter. PSoC Device Characteristics Depending on your PSoC device characteristics, the digital and analog systems can have 16, 8, or 4 digital blocks, and 12, 6, or 4 analog blocks. Table 1 on page 7 lists the resources available for specific PSoC device groups. The PSoC device covered by this datasheet is highlighted in this table. Table 1. PSoC Device Characteristics PSoC Part Number Digital I/O Digital Rows Digital Blocks Analog Inputs Analog Outputs Analog Columns Analog Blocks SRAM Size Flash Size CY8C29x66 up to 64 4 16 up to 12 4 4 12 2 K 32 K CY8C28xxx up to 44 up to 3 up to 12 up to 44 up to 4 up to 6 up to 12 + 4[2] 1 K 16 K CY8C27x43 up to 44 2 8 up to 12 4 4 12 256 16 K CY8C24x94 up to 56 1 4 up to 48 2 2 6 1 K 16 K CY8C24x23A up to 24 1 4 up to 12 2 2 6 256 4 K CY8C23x33 up to 26 1 4 up to 12 2 2 4 256 8 K CY8C22x45 up to 38 2 8 up to 38 0 4 6[2] 1 K 16 K CY8C21x45 up to 24 1 4 up to 24 0 4 6[2] 512 8 K CY8C21x34 up to 28 1 4 up to 28 0 2 4[2] 512 8 K CY8C21x23 up to 16 1 4 up to 8 0 2 4[2] 256 4 K CY8C20x34 up to 28 0 0 up to 28 0 0 3[2,3] 512 8 K CY8C20xx6 up to 36 0 0 up to 36 0 0 3[2,3] up to 2 K up to 32 K Notes 2. Limited analog functionality. 3. Two analog blocks and one CapSense®. |
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