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CS5535 数据表(PDF) 63 Page - National Semiconductor (TI) |
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CS5535 数据表(HTML) 63 Page - National Semiconductor (TI) |
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63 / 555 page  Revision 0.8 63 www.national.com Global Concepts and Features (Continued) 00Eh Slave DMA Reset Mask - Channels [3:0] 8-bit Shw@ Reads return value B2h. 00Fh Slave DMA General Mask - Channels [3:0] 8-bit Shw@ Reads return value B2h. 010h-01Fh No Specific Usage --- --- 020h PIC Master - Command/Status 8-bit Shw$ 021h PIC Master - Command/Status 8-bit Shw$ 022h-03Fh No Specific Usage --- --- 040h PIT – System Timer 8-bit Shw$ 041h PIT – Refresh Timer 8-bit Shw$ 042h PIT – Speaker Timer 8-bit Shw$ 043h PIT – Control 8-bit Shw$ 044h-05Fh No Specific Usage --- --- 060h Keyboard/Mouse - Data Port 8-bit Yes If KEL Memory Offset 100h[0] = 1 (EmulationEnable bit). If MSR 5140001Fh[0] = 1 (SNOOP bit) and KEL Memory Offset 100h[0] = 0 (EmulationEnable bit). 061h Port B Control 8-bit Yes 062h-063h No Specific Usage --- --- 064h Keyboard/Mouse - Command/ Status 8-bit Yes If KEL Memory Offset 100h[0] = 1 (EmulationEnable bit). If MSR 5140001Fh[0] = 1 (SNOOP bit) and KEL Memory Offset 100h[0] = 0 (EmulationEnable bit). 065h-06Fh No Specific Usage --- --- 070h-071h RTC RAM Address/Data Port 8-bit Yes Options per MSR 51400014h[0]. (Note 1) 072h-073h High RTC RAM Address/Data Port 8-bit Yes Options per MSR 51400014h[1]. 074h-077h No Specific Usage --- --- 078h-07Fh No Specific Usage --- --- 080h Post Code Display 8-bit Rec Write LPC and DMA. Read only DMA. 081h DMA Channel 2 Low Page 8-bit Rec Upper addr bits [23:16]. Write LPC and DMA. Read only DMA. 082h DMA Channel 3 Low Page 083h DMA Channel 1 Low Page 084h-086h No Specific Usage 8-bit Rec Write LPC and DMA. Read only DMA. 087h DMA Channel 0 Low Page 8-bit Rec Upper addr bits [23:16]. Write LPC and DMA. Read only DMA. 088h No Specific Usage 8-bit Rec Write LPC and DMA. Read only DMA. 089h DMA Channel 6 Low Page 8-bit Rec Upper addr bits [23:16]. Write LPC and DMA. Read only DMA. 08Ah DMA Channel 7 Low Page 08B DMA Channel 5 Low Page Table 3-6. Legacy I/O: 000h-4FFh (Continued) I/O Addr. Function Size R/W Comment |
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