OXCF950 datasheet(14/66 Pages) OXFORD

14 / 66 page

DS-0027 Feb 06

External—Free Release

Page 14 of 66

OXCF950 rev B DATA SHEET

OXFORD SEMICONDUCTOR, INC.

Figure 5: 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 4.

UART Address (hex)

CF/PCMCIA offset from

address 0 for UART

function in IO space (hex)

Table 4: 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 5. 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.

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

0xFF

0x00

0xFF

Attribute

Additional Storage

Space, which can be

downloaded from the

EEPROM.

0x7F

0x80

Function

Configuration

Registers

0xF8

0xF6

NOT VALID

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