Use of the TA(Transfer Acknowledge) pin of MPC8270

[liuzichang007]

There are SDRAM,FLASH,bootROM DPRAM link to the MPC8270 60x bus ,The number of memories and pins are as follows：

4 SDRAM:A[12:0],D[15:0],/CS,/WE,/CAS,/RAS,DQMH,DQML,BA0,BA1;

1 bootROM:A[18:0],D[7:0],/CE,/OE,/WE;

1 FLASH:A[25:0],D[15:0],/CE,/OE,/WE;

1 DPRAM:A[12:0],D[15:0],/BUSY(Output),R/W,/OE,/CEL,/LBL,/UBL,/INT(Output),/SEM;

How to link those memorry to the 60x bus when it use as 60x-Bus Compatible Mode(TA as input in this mode)?

How to configure in uboot or in OS when I want to link the /BUSY(output) signal to the the TA(configure as input) pin of MPC8270 use as a mechanism to avoid read and write conflict of DPRAM ?

The TA(Transfer Acknowledge) only can be use in UPM mode? How about in GPCM mode?

[ufedor]

> How to link those memorry to the 60x bus when it use as

> 60x-Bus Compatible Mode(TA as input in this mode)?

PQ2FADS-VR Schematics:

MPC82xx Family Application Development System|NXP 

> How to configure in uboot or in OS when I want to link the /BUSY(output) signal

> to the the TA(configure as input) pin of MPC8270 use as a mechanism to avoid

> read and write conflict of DPRAM ?

No special software configuring is needed.

> The TA(Transfer Acknowledge) only can be use in UPM mode? How about in GPCM mode?

Please refer to the AN2176 - MPC8260 GPCM Timing Diagram:

http://cache.nxp.com/assets/documents/data/en/application-notes/AN2176.pdf?fsrch=1&sr=1&pageNum=1 

and GPCM Timing Generator:

[Archive]:GPCM Timing Generator