High-Performance SAB 80C517A/83C517A-5 8-Bit CMOS Single ...

SAB 80C517A/83C517A-5Special Function RegistersAll registers, except the program counter and the four general purpose register banks, residein the special function register area. The 81 special function registers include arithmeticregisters, pointers, and registers that provide an interface between the CPU and the on-chipperipherals. There are also 128 directly addressable bits within the SFR area. All specialfunction registers are listed in table 1 and table 2.In table 1 they are organized in numeric order of their addresses. In table 2 they are organizedin groups which refer to the functional blocks of the SAB 80C517A.Table 2Special Function RegisterAddress Register Contentsafter ResetAddress Register Contentsafter Reset80 H P0 1)81 H82 H83 H84 H85 H86 H87 HSPDPLDPH(WDTL) 3)(WDTH) 3)WDTRELPCONFF H07 H00 H00 H(00 H )(00 H )00 H00 H98 H99 H9A H9B H9C H9D H9E H9F HS0CON 1)S0BUFIEN2S1CONS1BUFS1RELLreservedreserved00 HXX HXX00 00X0 B0X00 0000 BXX H00 HXX HXX H88 H TCON 1)89 H TMOD8A H TL08B H TL18C H TH08D H TH18E H reserved8F H reserved00 H00 H00 H00 H00 H00 HXX H2)XX H2)A0 H P2 1)A1 HA2 HA3 HA4 HA5 HA6 HA7 HCOMSETLCOMSETHCOMCLRLCOMCLRHSETMSKCLRMSKreservedFF H00 H00 H00 H00 H00 H00 HXX H2)90 H P1 1)91 H92 H93 H94 H95 H96 H97 HXPAGEDPSELreservedreservedreservedreservedreservedFF H00 HXXXXX000 BXX H2)XX H2)XX H2)XX H2)XX H2)A8 H IEN0 1)A9 H IP0AA H S0RELLAB H reservedAC H reservedAD H reservedAE H reservedAF H reserved00 H00 HD9 HXX H2)XX H2)XX H2)XX H2)XX H2)1)Bit-addressable special function registers2)X means that the value is indeterminate and the location is reserved3)( )... SFRs not user accessableSemiconductor Group 26