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AS1163 数据表(PDF) 30 Page - ams-OSRAM AG |
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AS1163 数据表(HTML) 30 Page - ams-OSRAM AG |
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30 / 91 page ![]() AS1163 Functional description Datasheet • PUBLIC • Document Feedback DS001075 • v2-00 • 2025-Nov-21 30 / 91 / The SIO mode is defined by pull-up/pull-down resistors connected to the SIO pins. A device will monitor each SIO pin at startup to detect the programmed SIO mode for SIO1 and SIO2. The recommended value for the pull-up and pull-down resistors is 10 kOhm. SAID SIO ports are equipped with an internal typical pull-down resistance of 100kOhm, so each of the listed pull-down cases may leave out the external pull-down. An external pull-down is recommended. Table 8: SIO communication modes vs. pull-up/down resistors SIOx_P SIOx_N R @ SIOx_P R @ SIOx_N Input Output Input Output Comment Pdown Pdown LVDS (Manchester) LVDS (Manchester) LVDS (Manchester) LVDS (Manchester) LVDS mode Pdown Pup - Data (NRZ) - Clock (NRZ) MCU mode EOL Pup Pdown Clk & Data (Manchester) Data (NRZ) - Clock (NRZ) MCU mode, normal (Type A) Pup Pdown Data (NRZ) Only SIO1 port - Clock(NRZ) Only SIO1 port - MCU normal mode (Type B), 2 wire SPI (selectable with OTP) Pup Pup - Clk & Data (Manchester) Clk & Data (Manchester) - CAN mode Additionally, the normal MCU communication mode is improved to require less computational power on the MCU side: • SIO1_N is by default high (always output driving the pad high instead of communicating input/output like SIO1_P). This will help to correctly sample the data on the posedge of SIO1_N clock avoiding spurious posedge transitions at the start of the device answer. • Device will wait 5 µs before to start an answer. This will leave more time to the MCU to reconfigure the interface direction. The typical data rate is 2.4 Mbps. The minimum break time between two consecutive telegrams sent by the MCU is 2 bits. |
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