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    • 1. 发明申请
    • PERFORMING AN N-BIT WRITE ACCESS TO AN MxN-BIT-ONLY PERIPHERAL
    • 执行N位写入访问仅MxN位的外设
    • WO2007037930A3
    • 2007-10-04
    • PCT/US2006034775
    • 2006-09-06
    • FREESCALE SEMICONDUCTOR INCCOFFEE CLARENCE KHARTUNG EYTAN
    • COFFEE CLARENCE KHARTUNG EYTAN
    • G06F13/36
    • G06F13/4018
    • A system-on-chip (100) includes a 16-bit DSP (102), a 16-bit data bus (202) coupled to the DSP, at least one 32-bit-only peripheral (110), a 32-bit data bus (212) coupled to the peripheral, and a bridge (108), including a write merge system (200), coupled between the 16-bit and 32-bit buses. A method of the write merge system includes pre-storing addresses of peripherals in a memory map structure (220 and 221), receiving 16-bit data and a write transaction from the DSP for modifying sixteen bits of a 32-bit data location of the peripheral; reading 32-bit contents of the data location of the peripheral; multiplexing the received 16-bit data with the read 32-bit contents; and writing a new 32-bit word, including the modified sixteen bits and an unmodified sixteen bits, to the data location of the peripheral, without any intervention from the DSP subsequent to receiving the write transaction.
    • 片上系统(100)包括16位DSP(102),耦合到DSP的16位数据总线(202),至少一个32位专用外设(110),32位 耦合到外围设备的数据总线(212),以及耦合在16位和32位总线之间的包括写合并系统(200)的桥(108)。 写入合并系统的方法包括预先存储存储器映射结构(220和221)中的外围设备的地址,接收来自DSP的16位数据和写入事务,用于修改数据的32位数据位置的16位 周; 读取外设的数据位置的32位内容; 将接收到的16位数据与读取的32位内容复用; 并且在接收到写入事务之后没有任何来自DSP的干预的情况下,将新的32位字(包括修改的16位和未修改的16位)写入外围设备的数据位置。
    • 3. 发明申请
    • PERFORMING AN N-BIT WRITE ACCESS TO AN MxN-BIT-ONLY PERIPHERAL
    • 执行N位写入到MxN-BIT只有外设
    • WO2007037930A2
    • 2007-04-05
    • PCT/US2006/034775
    • 2006-09-06
    • FREESCALE SEMICONDUCTOR INC.COFFEE, Clarence K.HARTUNG, Eytan
    • COFFEE, Clarence K.HARTUNG, Eytan
    • G06F13/36
    • G06F13/4018
    • A system-on-chip (100) includes a 16-bit DSP (102), a 16-bit data bus (202) coupled to the DSP, at least one 32-bit-only peripheral (110), a 32-bit data bus (212) coupled to the peripheral, and a bridge (108), including a write merge system (200), coupled between the 16-bit and 32-bit buses. A method of the write merge system includes pre-storing addresses of peripherals in a memory map structure (220 and 221), receiving 16-bit data and a write transaction from the DSP for modifying sixteen bits of a 32-bit data location of the peripheral; reading 32-bit contents of the data location of the peripheral; multiplexing the received 16-bit data with the read 32-bit contents; and writing a new 32-bit word, including the modified sixteen bits and an unmodified sixteen bits, to the data location of the peripheral, without any intervention from the DSP subsequent to receiving the write transaction.
    • 片上系统(100)包括16位DSP(102),耦合到DSP的16位数据总线(202),至少一个32位专用外设(110),32位 耦合到所述外围设备的数据总线(212)以及耦合在所述16位和32位总线之间的包括写入合并系统(200)的桥接器(108)。 一种写合并系统的方法,包括将存储器地址的地址存储在存储器映射结构(220和221)中,从DSP接收16位数据和写事务,用于修改32位数据位的16位 周; 读取外设数据位的32位内容; 所接收的16位数据与读取的32位内容复用; 并将新的32位字,包括经修改的十六位和未修改的十六位,写入外设的数据位置,而无需在接收到写事务之后由DSP进行干预。