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AT91SAM7S321 Datasheet(PDF) 3 Page - ATMEL Corporation |
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AT91SAM7S321 Datasheet(HTML) 3 Page - ATMEL Corporation |
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3 / 42 page  3 6175BS–ATARM–04-Nov-05 AT91SAM7S Series Summary 1. Description Atmel’s AT91SAM7S is a series of low pincount Flash microcontrollers based on the 32-bit ARM RISC processor. It features a high-speed Flash and an SRAM, a large set of peripherals, includ- ing a USB 2.0 device (except for the AT91SAM7S32), and a complete set of system functions minimizing the number of external components. The device is an ideal migration path for 8-bit microcontroller users looking for additional performance and extended memory. The embedded Flash memory can be programmed in-system via the JTAG-ICE interface or via a parallel interface on a production programmer prior to mounting. Built-in lock bits and a secu- rity bit protect the firmware from accidental overwrite and preserves its confidentiality. The AT91SAM7S Series system controller includes a reset controller capable of managing the power-on sequence of the microcontroller and the complete system. Correct device operation can be monitored by a built-in brownout detector and a watchdog running off an integrated RC oscillator. The AT91SAM7S Series are general-purpose microcontrollers. Their integrated USB Device port makes them ideal devices for peripheral applications requiring connectivity to a PC or cellu- lar phone. Their aggressive price point and high level of integration pushes their scope of use far into the cost-sensitive, high-volume consumer market. 2. Configuration Summary of the AT91SAM7S256, AT91SAM7S128, AT91SAM7S64, AT91SAM7S321 and AT91SAM7S32 The AT91SAM7S256, AT91SAM7S128, AT91SAM7S64, AT91SAM7S321 and AT91SAM7S32 differ in memory size, peripheral set and package. Table 2-1 summarizes the configuration of the five devices. Except for the AT91SAM7S32, all other AT91SAM7S devices are package and pinout compatible. Notes: 1. Manchester Encoder/Decoder, Fractional Baud Rate. 2. Full modem line support on USART1. Table 2-1. Configuration Summary Device Flash SRAM USB Device Port USART External Interrupt Source PDC Channels TC Channels I/O Lines Package AT91SAM7S256 256K byte 64K byte 1 2(1) (2) 2 11 3 32 LQFP 64 AT91SAM7S128 128K byte 32K byte 1 2(1) (2) 2 11 3 32 LQFP 64 AT91SAM7S64 64K byte 16K byte 1 2(2) 2 11 3 32 LQFP 64 AT91SAM7S321 32K byte 8K byte 1 2(2) 2 11 3 32 LQFP 64 AT91SAM7S32 32K byte 8K byte not present 1 1 9 2 21 LQFP 48 |
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