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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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Q67127-C2056 데이터시트(PDF) 20 Page - Siemens Semiconductor Group |
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Q67127-C2056 데이터시트(HTML) 20 Page - Siemens Semiconductor Group |
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20 / 85 page  Semiconductor Group 20 1997-12-01 C505 / C505C C505A / C505CA Special Function Registers The registers, except the program counter and the four general purpose register banks, reside in the special function register area. The special function register area consists of two portions : the standard special function register area and the mapped special function register area. Five special function register of the C505 (PCON1,P1ANA, VR0, VR1, VR2) are located in the mapped special function register area. For accessing the mapped special function register area, bit RMAP in special function register SYSCON must be set. All other special function registers are located in the standard special function register area which is accessed when RMAP is cleared (“0“). The registers and data locations of the CAN controller (CAN-SFRs) are located in the external data memory area at addresses F700H to F7FFH.. Special Function Register SYSCON (Address B1H) Reset Value : XX100X01B (C505CA only) Reset Value : XX100001B As long as bit RMAP is set, mapped special function register area can be accessed. This bit is not cleared by hardware automatically. Thus, when non-mapped/mapped registers are to be accessed, the bit RMAP must be cleared/set respectively by software. All SFRs with addresses where address bits 0-2 are 0 (e.g. 80H, 88H, 90H, 98H, ..., F8H, FFH) are bitaddressable. The 52 special function registers (SFRs) in the standard and mapped SFR area include pointers and registers that provide an interface between the CPU and the other on-chip peripherals. The SFRs of the C505 are listed in table 4 and table 5. In table 4 they are organized in groups which refer to the functional blocks of the C505. The CAN-SFRs (applicable for the C505C and C505CA only) are also included in table 4. Table 5 illustrates the contents of the SFRs in numeric order of their addresses. Table 6 list the CAN-SFRs in numeric order of their addresses. . Bit Function RMAP Special function register map bit RMAP = 0 : The access to the non-mapped (standard) special function register area is enabled. RMAP = 1 : The access to the mapped special function register area is enabled. 76543210 EALE RMAP CMOD B1H SYSCON Bit No. MSB LSB CSWO XMAP1 –– XMAP0 The functions of the shaded bits are not described here. 1) 1) This bit is only available in the C505CA. |
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