LTC1407-1 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC1407-1' PDF : 24 Pages View PDF
LTC1407-1/LTC1407A-1
APPLICATIO S I FOR ATIO
* 2' 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 ‘C54x 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 ((CLKDIV)|(FS_polarity <<5)|(CLK_polarity<<6)|((Format &
1)<<7)|(Frame_ignore<<8)|(PCM_Mode<<9)), SPCEval
.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 flags
; 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
14071f
22
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