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BQ79600-Q1 Datasheet(PDF) 18 Page - Texas Instruments |
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BQ79600-Q1 Datasheet(HTML) 18 Page - Texas Instruments |
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18 / 71 page  0000 1111 0000 1011 0000 0011 1001 0100) After Initialization (XOR with 0xFFFF) = 0b0 1111 1110 1111 1111 0100 0000 1111 0000 1101 0000 0000 0011 1001 0100 1111 1110 1111 1111 0100 0000 1111 0000 1101 0000 0000 0011 1001 010 #delete leading zeros from previous result 1100 0000 0000 0010 1 #XOR with polynomial 0011 1110 1111 1101 1100 0000 1111 0000 1101 0000 0000 0011 1001 0100 11 1110 1111 1101 1100 0000 1111 0000 1101 0000 0000 0011 1001 0100 #delete leading zeros from previous result 11 0000 0000 0000 101 #XOR with polynomial 00 1110 1111 1101 0110 0000 1111 0000 1101 0000 0000 0011 1001 0100 …… …… …… 1100 0110 0000 0010 1001 0100 1100 0000 0000 0010 1 #XOR with polynomial 0000 0110 0000 0000 0001 0100 1 1000 0000 0000 0101 00 1 1000 0000 0000 0101 #XOR with polynomial 0 0000 0000 0000 0000 00 0x0000 #verfiy that CRC checks out valid Note The result of ‘0b0000 0000 0000 0000’ for the CRC indicates a successful check. 7.3.2.1.2 Physical Layer 7.3.2.1.2.1 UART Communication between host and BQ79600-Q1 can be configured to UART mode, refer to Section 7.3.1.3. The UART interface baud rate is default to 1Mbps at power up or digital reset. The UART interface follows the standard serial protocol of 8-N-1 (see Figure 7-10), where it sends information as a START bit, followed by eight data bits, and then one STOP bit. The STOP bit indicates the end of the byte. The protocol also supports two STOP bits. When the device is configured as 2 stop bits ([TWO_STOP_EN] = 1, stack devices should also be set as two stop bits), the UART response frame from the device to MCU will always return with 2 stop bits. The UART sends data on the TX pin and receives data on the RX pin. When idle, the TX and RX are high. TX is always pulled to VIO internally while in ACTIVE or SLEEP mode, whether enabled or disabled. The UART interface is strictly a half-duplex interface. While transmitting, any attempted communication on RX is ignored. The only exception is Section 7.3.2.1.2.1.2. bit0 bit1 bit2 bit3 bit4 bit5 bit6 bit7 START . . . bit period = 1/ baud rate LSB Stop is oÁ Ç• Z1[ MSB STOP . . . 1 or 2 bit period Start is oÁ Ç• Z0[ Figure 7-10. UART Character Definition Note: User can change baud rate using register bit [UART_VIF_BAUD] for debug purpose. 7.3.2.1.2.1.1 TX HOLD OFF UART transmitter is configurable to wait a specified number of bit periods after the last bit reception of Single Device read command frame from host before starting transmitting Response Frame using the TX_HOLD_OFF register, as showed in Figure 7-11. This provides time for the host to switch the bus direction at the end of its transmission. Note Host does not need to configure register TX_HOLD_OFF in BQ79600-Q1 if Stack Read command is used. Host shall not use Broadcast Read Command. BQ79600-Q1 SLUSDS1A – NOVEMBER 2019 – REVISED AUGUST 2020 www.ti.com 18 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated Product Folder Links: BQ79600-Q1 |
Similar Part No. - BQ79600-Q1_V01 |
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Similar Description - BQ79600-Q1_V01 |
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