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EM78612 Datasheet(PDF) 9 Page - ELAN Microelectronics Corp |
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EM78612 Datasheet(HTML) 9 Page - ELAN Microelectronics Corp |
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9 / 28 page  EM78612 Universal Serial Bus Microcontroller Product Specification (V1.1) 04.28.2004 5 (This specification is subject to change without further notice) 7 Function Description The EM78612memory is organized into four spaces, namely; User Program Memory in 2048*13 bits MASK ROM space, Data Memory in 80 bytes SRAM space, and USB Application FIFOs (for EndPoint0 and EndPoint1). Furthermore, several registers are used for special purposes. 7.1 Program Memory The program space of the EM78612 is 2K bytes, and is divided into two pages. Each page is 1K bytes long. After Reset, the 12-bit Program Counter (PC) points to location zero of the program space. It has two interrupt vectors, i.e., Interrupt Vectors at 0x0001 and USB Application Interrupt Vectors at 0x000A. The Interrupt Vector applies to TCC Interrupt, and Port 5 State Changed Interrupt. The USB Application Interrupt Vector is for USB EndPoint Zero Interrupt, USB Suspend Interrupt, USB Reset interrupt, and USB Host Resume Interrupt. After an interrupt, the MCU will fetch the next instruction from the corresponding address as illustrated in the following diagram. After reset Address 0x0000 Reset Vector 0x0001 Interrupt Vector 0x000A USB Application Interrupt Vector 0x03FF Page 0 0x0400 0x07FF Page 1 PC |
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