ISM480 GPS UART, SPI and I2C levels

  1. UART
    1. MARK (Logic 1) = Logic High
    2. Space (Logic 0) = Logic Low
    3. Idle Line = Logic High
    4. Line-break/open line = Continuous Logic Low
  2. SPI
    1. Slave Mode
    2. Idle Pattern: A7B4
    3. Maximum Clock = 6.8 MHz
    4. Default Clock Polarity and Phase: CPOL = 0, CPHA = 1
    5. Timing

I2C Port Timing

  1. I2C
    1. Default Address Format: 7-bit
    2. Master Address (sending) is 0x62
    3. Slave Address (receiving) is 0x60
    4. Data Frame Size:  8-bit octets
    5. Data Bit Order:   MSB,LSB
    6. Data Rates:       Default = Fast Mode (400 kbps), Standard Mode (100kbps)
    7. Timing

Serial Peripheral Interface timing format

Posted in: GPS, Sirf IV