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SST89E58RD2-40-C-PI Datasheet(PDF) 32 Page - Silicon Storage Technology, Inc |
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SST89E58RD2-40-C-PI Datasheet(HTML) 32 Page - Silicon Storage Technology, Inc |
32 / 91 page 32 Preliminary Specifications FlashFlex51 MCU SST89E52RD2 / SST89E54RD2 / SST89E58RD2 / SST89E516RD2 SST89V52RD2 / SST89V54RD2 / SST89V58RD2 / SST89V516RD2 ©2004 Silicon Storage Technology, Inc. S71255-00-000 3/04 Symbol Function FE Set SMOD0 = 1 to access FE bit. 0: No framing error 1: Framing Error. Set by receiver when an invalid stop bit is detected. This bit needs to be cleared by software. SM0 SMOD0 = 0 to access SM0 bit. Serial Port Mode Bit 0 SM1 Serial Port Mode Bit 1 SM2 Enables the Automatic Address Recognition feature in Modes 2 or 3. If SM2 = 1 then RI will not be set unless the received 9th data bit (RB8) is 1, indicating an address, and the received byte is a given or broadcast address. In Mode 1, if SM2 = 1 then RI will not be activated unless a valid stop bit was received. In Mode 0, SM2 should be 0. REN Enables serial reception. 0: to disable reception. 1: to enable reception. TB8 The 9th data bit that will be transmitted in Modes 2 and 3. Set or clear by software as desired. RB8 In Modes 2 and 3, the 9th data bit that was received. In Mode 1, if SM2 = 0, RB8 is the stop bit that was received. In Mode 0, RB8 is not used. TI Transmit interrupt flag. Set by hardware at the end of the 8th bit time in Mode 0, or at the beginning of the stop bit in the other modes, in any serial transmission, Must be cleared by software. RI Receive interrupt flag. Set by hardware at the end of the8th bit time in Mode 0, or halfway through the stop bit time in the other modes, in any serial reception (except see SM2). Must be cleared by software. Serial Port Control Register (SCON) Location 76543210 Reset Value 98H SM0/FE SM1 SM2 REN TB8 RB8 TI RI 00000000b SM0 SM1 Mode Description Baud Rate1 1. fOSC = oscillator frequency 0 0 0 Shift Register fOSC/6 (6 clock mode) or fOSC/12 (12 clock mode) 0 1 1 8-bit UART Variable 10 2 9-bit UART fOSC/32 or fOSC/16 (6 clock mode) or fOSC/64 or fOSC/32 (12 clock mode) 1 1 3 9-bit UART Variable |
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