Texas Instruments TMS320F20x/F24x DSP manual Flash Test Register TST, Write Address Register Wadrs

Flash Module Control Registers

PRELIMINARY

Table 2±4. Flash Array Segments Summary

		SEG7±SEG0 Bits						'F206/F240 Flash Module²		'F241/F243	Array Segment
15	14	13	12	11	10	9	8	Flash0	Flash1	Flash Module	Enabled
0	0	0	0	0	0	0	1	0000±07FFh	4000±47FFh	0000±03FFh	0
0	0	0	0	0	0	1	0	0800±0FFFh	4800±4FFFh	0400±07FFh	1
0	0	0	0	0	1	0	0	1000±17FFh	5000±57FFh	0800±0BFFh	2
0	0	0	0	1	0	0	0	1800±1FFFh	5800±5FFFh	0C00±0FFFh	3
0	0	0	1	0	0	0	0	2000±27FFh	6000±67FFh	1000±13FFh	4
0	0	1	0	0	0	0	0	2800±2FFFh	6800±6FFFh	1400±17FFh	5
0	1	0	0	0	0	0	0	3000±37FFh	7000±77FFh	1800±1BFFh	6
1	0	0	0	0	0	0	0	3800±3FFFh	7800±7FFFh	1C00±1FFFh	7

²The TMS320F206 has two flash modules. The TMS320F240 device uses the address ranges shown for Flash0.

Although segmentation is not supported during erase (i.e., the entire array must be erased simultaneously), the segment enable bits can be used to pro- tect portions of the array against unintentional programming. This is useful for applications in which different portions of the array are programmed at differ- ent times. For example, an application might program the flash module with a large table in 2K ×16 blocks. Some time after the first block is programmed, the next block is programmed. The segment enable bits can be used to prevent corruption of the first block while the second block is being programmed.

2.3.2Flash Test Register (TST)

The flash test register (TST) is a 5-bit register used during manufacturing test of the flash array. This register is not accessible to the DSP core.

2.3.3Write Address Register (WADRS)

The write address register (WADRS) is a 16-bit register that holds the latched write address for a programming operation. In array-access mode, this regis- ter is loaded with the value on the address bus when you are writing a data value to the flash module. It can be loaded directly in register-access mode by writing to it.

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