参数资料
型号: TLV5614CDG4
厂商: TEXAS INSTRUMENTS INC
元件分类: DAC
英文描述: SERIAL INPUT LOADING, 9 us SETTLING TIME, 12-BIT DAC, PDSO16
封装: GREEN, PLASTIC, MS-012AC, SOIC-16
文件页数: 10/34页
文件大小: 737K
代理商: TLV5614CDG4
TLV5614
2.7-V TO 5.5-V 12-BIT 3-
S QUADRUPLE DIGITAL-TO-ANALOG CONVERTERS
WITH POWER DOWN
SLAS188B – SEPTEMBER 1998 – REVISED APRIL 2003
18
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
;–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
; Main Program
;–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
.ps
1000h
.entry
start
;–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
; disable interrupts
;–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
setc
INTM
; disable maskable interrupts
splk
#0ffffh, IFR; clear all interrupts
splk
#0004h, IMR; timer interrupts unmasked
;–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
; set up the timer
; timer period set by values in PRD and TDDR
; period = (CLKOUT1 period) x (1+PRD) x (1+TDDR)
; examples for TMS320C203 with 40MHz main clock
; Timer rate
TDDR
PRD
;
80 kHz
9
24 (18h)
;
50 kHz
9
39 (27h)
;–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
prd_val.equ
0018h
tcr_val.equ
0029h
splk
#0000h, temp; clear timer
out
temp, TIM
splk
#prd_val, temp; set PRD
out
temp, PRD
splk
#tcr_val, temp; set TDDR, and TRB=1 for auto–reload
out
temp, TCR
;–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
; Configure IO0/1 as outputs to be :
; IO0
CS
– and set high
; IO1
LDAC
– and set high
;–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
in
temp, ASPCR; configure as output
lacl
temp
or
#0003h
sacl
temp
out
temp, ASPCR
in
temp, IOSR; set them high
lacl
temp
or
#0003h
sacl
temp
out
temp, IOSR
;–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
; set up serial port for
; SSPCR.TXM=1
Transmit mode – generate FSX
; SSPCR.MCM=1
Clock mode – internal clock source
; SSPCR.FSM=1
Burst mode
;–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
splk
#0000Eh, temp
out
temp, SSPCR; reset transmitter
splk
#0002Eh, temp
out
temp,SSPCR
;–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
; reset the rolling pointer
;–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
lacl
#000h
sacl
r_ptr
;–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
; enable interrupts
;–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
clrc
INTM
; enable maskable interrupts
;–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
; loop forever!
;–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
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