21

LTC1407/LTC1407A

1407f

APPLICATIO S I FOR ATIO

.space

24*16

;68-7F; reserved area

**********************************************************************

*

(C) COPYRIGHT TEXAS INSTRUMENTS, INC. 1996

*

**********************************************************************

*

*

* File: BSPI1407A.ASM

BSP initialization code for the ‘C54x DSKplus

*

*

for use with 1407A in standard mode

*

*

BSPC and SPC seem interchangeable in the ‘C542

*

*

BSPCE and SPCE seem interchangeable in the ‘C542

*

**********************************************************************

.title “Buffered Serial Port Initialization Routine”

ON

.set 1

OFF

.set !ON

YES

.set 1

NO

.set !YES

BIT_8

.set 2

BIT_10

.set 1

BIT_12

.set 3

BIT_16

.set 0

GO

.set 0x80

**********************************************************************

* This is an example of how to initialize the Buffered Serial Port (BSP).

* The BSP is initialized to require an external CLK and FSX for

* operation. The data format is 16-bits, burst mode, with autobuffering

* enabled. Set the variables listed below to configure the BSP for

* your application.

*

*****************************************************************************************************

*LTC1407A timing with 40MHz crystal.

*

*10MHz, divided from 40MHz, forced to CLKIN by 1407A board.

*

*Horizontal scale is 6.25ns/chr or 25ns period at BCLKR

*

*BFSR

Pin J1-20 ~~\____/~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\____/

~~~~~~~~~~~*

*BCLKR Pin J1-14 _/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/

~\_/~\_/~*

*BDR

Pin J1-26 _—_—_—<B13-B12-B11-B10-B09-B08-B07-B06-B05-B04-B03-B02-B01-B00>—_—<B13-

B12*

*CLKIN Pin J5-09 ~~~~~\_______/~~~~~~~\_______/~~~~~~~\_______/~~~~~~~\_______/

~~~~~~~\_______/~~~~~*

*C542 read

0

B13 B12 B11 B10 B09 B08 B07 B06 B05 B04 B03 B02 B01 B00

0

0

B13 B12*

*

*

* negative edge BCLKR

* negative BFSR pulse

* no data shifted

* 1' cable from counter to CONV at DUT