Texas Instruments TMS320F20x/F24x DSP 2.2.2 TMS320F24x Flash Access-Control Register, Preliminary

PRELIMINARY

Accessing the Flash Module

Although the function is the same, the access control registers of the 'F206 de- vice are mapped at different addresses from that of the 'F24x devices, and their values are modified in a different way.

2.2.2TMS320F24x Flash Access-Control Register

The access-control register of the 'F24x devices is a special type of I/O- mapped register that cannot be read. The register is mapped at I/O address 0FF0Fh, and it functions as indicated below.

Note:

For both the IN and OUT instructions, the data operand (dummy) is not used, and can be any valid memory location.

An OUT instruction using the register address as an I/O port places the flash module in register-access mode.

For example:

OUT dummy, 0FF0Fh ;Selects register-access mode

An IN instruction using the register address as an I/O port places the flash module in array-access mode.

The data operand (dummy) is not used, and can be any valid memory location.

For example:

IN dummy, 0FF0Fh ;Selects array-access mode

PRELIMINARY Flash Operations and Control Registers 2-7