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OX16CF950 Datasheet(PDF) 11 Page - List of Unclassifed Manufacturers |
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OX16CF950 Datasheet(HTML) 11 Page - List of Unclassifed Manufacturers |
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11 / 60 page  Page 11 OXCF950 DATA SHEET V1.1 OXFORD SEMICONDUCTOR LTD. Figure 4: Normal Mode memory space map 5.2.2 Normal Mode Space Map 5.3 Access to IO Function 5.3.1 Access to Internal UART Access to the internal UART is achieved via standard IO mapping. As the device is configured as a single function device, no base address is required to access the UART. As IO mapping is used, access to the UART is permitted only after the card has been configured. Once the Configuration Options Register has been set in the Attribute area, the UART can be accessed following the mapping shown in Table 3. UART Address (hex) CF/PCMCIA offset from address 0 for UART function in IO space (hex) 0 0 1 1 2 2 3 3 4 4 5 5 6 6 7 7 Table 3: UART's mapping in I/O space 5.3.2 Access to Local Bus Access to the internal Local Bus is achieved via standard IO mapping. The Local Bus function is available in Local Bus mode only as it’s device pins are used as the extended address bits required for direct access in Normal mode. Indirect access is only supported in the PCMCIA specification, so the local bus is only available in PCMCIA systems. As the device is configured as a single function device, no base address is required to access the Local Bus. As IO mapping is used, access to the Local Bus is permitted only after the card has been configured. Once the Configuration Options Register has been set in the Attribute area, the Local Bus can be accessed following the mapping shown in table Table 4. This access is permitted only if bit[0] is reset to ‘0’ in the MDR register in the UART, otherwise the local configuration registers will be accessed rather than the local bus. Local Bus Address1 (hex) CF/PCMCIA offset from address 0 for Local Bus function in IO space (hex) 0 8 1 9 2 A 3 B 4 C 5 D 6 E 7 F Table 4: Local Bus mapping in I/O space Note 1: Although only 4 bits of IO address space are requested by the default CIS in the device, the address range may be extended past these four bits. This can be achieved by modifying the CIS, via the EEPROM, and connecting the extended address bits to the external local bus device. Direct Indirect Main CIS either: a) Normal Default b) Bluetooth Default c) Custom CIS (downloaded from EEPROM) 0xFF Common (Valid at even locations only) 0x00 0x00 0x00 0xFF 0xFF 0x00 0xFF Attribute Additional Storage Space, which can be downloaded from the EEPROM. 0x7F 0x80 Function Configuration Registers 0xF8 0xF6 NOT VALID NOT VALID NOT VALID |
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