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CS5535 Datasheet(PDF) 127 Page - National Semiconductor (TI) |
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CS5535 Datasheet(HTML) 127 Page - National Semiconductor (TI) |
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127 / 555 page  Revision 0.8 127 www.national.com UART/IR Controller Functional Description (Continued) 4.11.1.1 UART Mode UART mode supports serial data communication with a remote peripheral device using a wired interface. This func- tional block provides receive and transmit channels that can operate concurrently in full-duplex mode. This func- tional block performs all functions required to conduct par- allel data interchange with the system and composite serial data exchange with the external data channel. It performs parallel-to-serial conversion on data characters received from the processor or a DMA controller, and serial-to-parallel conversion on data characters received from the serial interface. Figure 4-34 shows the serial data stream. A data character contains five to eight data bits. It is preceded by a START bit and is followed by an optional PARITY bit and a STOP bit. Data is transferred in Little Endian order (LSB first). Figure 4-34. UART Serial Data Stream Format 02h SH_FCR RXFTH[1:0] TXFTH[1:0] RSVD TXSR RXSR FIFO_EN 03h BSR BKSE BSR[6:0] 04h- 07h RSVD RSVD Bank 4 00h- 01h RSVD RSVD 02h IRCR1 RSVD IR_SL[1:0] RSVD 03h BSR BKSE BSR[6:0] 04h- 07h RSVD RSVD Bank 5 00h- 02h RSVD RSVD 03h BSR BKSE BSR[6:0] 04h IRCR2 RSVD RSVD RSVD AUX_IRRX RSVD RSVD IRMSSL IR_FDPLX 05h- 07h RSVD RSVD Bank 6 00h IRCR3 SHDM_DS SHMD_DS RSVD 01h RSVD RSVD 02h SIR_PW RSVD SPW3 SPW2 SPW1 SPW0 03h BSR BKSE BSR[6:0] 04h- 07h RSVD RSVD Bank 7 00h IRRXDC DBW[2:0] DFR[4:0] 01h IRTXMC MCPW[2:0] MCFR[4:0] 02h RCCFG R_LEN T_OV RXHSC RCDM_DS RSVD TXHSC RC_MMD[1:0] 03h BSR BKSE BSR[6:0] 04h IRCFG1 STRV_MS RSVD SET_IRTX IRRX1_LV RSVD IRIC[2:0] 05h- 06h RSVD RSVD 07h IRCFG4 RSVD IRSL0_DS RXINV IRSL21_DS RSVD Note 1. Non-Extended Mode. Note 2. Extended Mode. Table 4-19. UART/IR Controller Native Register Bit Map (Continued) I/O Offset Name 7 654 3210 START -LSB- DATA[5:8] -MSB- PARITY STOP |
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