LTC1403_15 Datasheet, PDF(17/20 Page) Linear Technology – Serial 12-Bit/14-Bit, 2.8Msps Sampling ADCs with Shutdown

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LTC1403_15 Datasheet, PDF (17/20 Pages) Linear Technology – Serial 12-Bit/14-Bit, 2.8Msps Sampling ADCs with Shutdown

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LTC1403/LTC1403A

APPLICATIONS INFORMATION

* negative edge BCLKR

* negative BFSR pulse

* no data shifted

* 1â cable from counter to CONV at DUT

* 2â cable from counter to CLK at DUT

*No right shift is needed to right justify the input data in the main program

*the two msbs should also be masked....................

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

Loopback

.set NO

;(digital looback mode?)

DLB bit

Format

.set BIT_16 ;(Data format? 16,12,10,8)

FO bit

IntSync

.set NO

;(internal Frame syncs generated?) TXM bit

IntCLK

.set NO

;(internal clks generated?)

MCM bit

BurstMode

.set YES

;(if BurstMode=NO, then Continuous) FSM bit

CLKDIV

.set 3

;(3=default value, 1/4 CLOCKOUT)

PCM_Mode

.set NO

;(Turn on PCM mode?)

FS_polarity

.set YES

;(change polarity)YES=^^^\_/^^^, NO=___/^\___

CLK_polarity .set NO

;(change polarity)for BCLKR YES=_/^, NO=~\_

Frame_ignore .set !YES

;(inverted !YES -ignores frame)

XMTautobuf

.set NO

;(transmit autobuffering)

RCVautobuf

.set YES

;(receive autobuffering)

XMThalt

.set NO

;(transmit buff halt if XMT buff is full)

RCVhalt

.set NO

;(receive buff halt if RCV buff is full)

XMTbufAddr

.set 0x800

;(address of transmit buffer)

XMTbufSize

.set 0x000

;(length of transmit buffer)

RCVbufAddr

.set 0x800

;(address of receive buffer)

RCVbufSize

.set 0x800

;(length of receive buffer)works up to 800

* See notes in the âC54x CPU and Peripherals Reference Guide on setting up

* valid buffer start and length values. Page 9-44

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

.eval ((Loopback >> 1)|((Format & 2)<<1)|(BurstMode <<3)|(IntCLK <<4)|(IntSync <<5)) ,SPCval

.eval (SPCEval|(XMTautobuf<<10)|(XMThalt<<12)|(RCVautobuf<<13)|(RCVhalt<<15)), SPCEval

sineinit:

bspc = #SPCval

ifr = #10h

imr = #210h

intm = 0

bspce = #SPCEval

axr = #XMTbufAddr

bkx = #XMTbufSize

arr = #RCVbufAddr

bkr = #RCVbufSize

bspc = #(SPCval | GO)

return

; places buffered serial port in reset

; clear interrupt ï¬ags

; Enable HPINT,enable BRINT0

; all unmasked interrupts are enabled.

; programs BSPCE and ABU

; initializes transmit buffer start address

; initializes transmit buffer size

; initializes receive buffer start address

; initializes receive buffer size

; bring buffered serial port out of reset

;for transmit and receive because GO=0xC0

; ***************************************************************************

; File: BVECTORS.ASM -> Vector Table for the âC54x DSKplus

10.Jul.96

;

BSP vectors and Debugger vectors

;

TDM vectors just return

; ***************************************************************************

; The vectors in this table can be conï¬gured for processing external and

; internal software interrupts. The DSKplus debugger uses four interrupt

; vectors. These are RESET, TRAP2, INT2, and HPIINT.

; * DO NOT MODIFY THESE FOUR VECTORS IF YOU PLAN TO USE THE DEBUGGER *

1403fb

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