Mode Bits:
There are two mode hardware bits (MOD0 and MOD1 pins) that when configured allow one of four possible serial control scenarios.
8/9 bits Serial Communication (MOD0): This bit specifies whether the SS chip UART will transmit and receive data commands on 8 bit data format or 9 bit data format. Pulling this bit low, configures the SS chip to work as an 8 bit data format UART, while pulling it high configures it to work as a 9 bit data format UART.
Serial Comm Port Configure (MOD1): This bit specifies whether the SS Chip will configure the UART with default values of 2400 BAUD rate and SS-Address 0, when pulled high; or will fetch the parameters from EEPROM locations 0 (BAUD Rate) and 1 (SS-Address), when pulled low.
- MOD0: Selects 8 bit (MOD0 = 0) or 9 bit (MOD 0 = 1) communications.
- MOD1: Selects BAUD rate and device address. MOD1 = 0 selects 2400 BAUD rate and Device Address 0 while MOD1 = 1 selects BAUD rate and Device address programmed on EEPROM addresses 00h and 01h.
Example:
- MOD[1:0] = 00 selects 8 bit communications with 2400 BAUD rate on address 0
- MOD[1:0] = 01 selects 9 bit communications with 2400 BAUD Rate on address 0
- MOD[1:0] = 10 selects 8 bit communications with BAUD rate and address as programmed on EEPROM
- MOD[1:0] = 11 selects 9 bit communications with BAUD rate and address as programmed on EEPROM
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Last Updated on Jan 10, 2008
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