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MAX186DC/D Datasheet

  • MAX186DC/D

  • 低功耗、8通道、串行12位ADC

  • 642.89KB

  • 0頁(yè)

  • MAXIM   MAXIM

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Low-Power, 8-Channel,
Serial 12-Bit ADCs
MAX186/MAX188
*Title : MAX186.ASM
* Description :
*
This is a shell program for using a stand-alone 68HC16 without any external memory. The internal 1K RAM
*
is put into bank $0F to maintain 68HC11 code compatibility. This program was written with software
*
provided in the Motorola 68HC16 Evaluation Kit.
*
* Roger J.A. Chen, Applications Engineer
* MAXIM Integrated Products
* November 20, 1992
*
******************************************************************************************************************************************************
INCLUDE
鈥楨QUATES.ASM鈥?;Equates for common reg addrs
INCLUDE
鈥極RG00000.ASM鈥?;initialize reset vector
INCLUDE
鈥極RG00008.ASM鈥?;initialize interrupt vectors
ORG $0200
;start program after interrupt vectors
INCLUDE 鈥業(yè)NITSYS.ASM鈥?/div>
;set EK=F,XK=0,YK=0,ZK=0
;set sys clock at 16.78 MHz, COP off
INCLUDE 鈥業(yè)NITRAM.ASM鈥?;turn on internal SRAM at $10000
;set stack (SK=1, SP=03FE)
MAIN:
JSR INITQSPI
MAINLOOP:
JSR READ186
WAIT:
LDAA SPSR
ANDA #$80
BEQ WAIT
;wait for QSPI to finish
BRA MAINLOOP
ENDPROGRAM:
INITQSPI:
;This routine sets up the QSPI microsequencer to operate on its own.
;The sequencer will read all eight channels of a MAX186/MAX188 each time
;it is triggered. The A/D converter results will be left in the
;receive data RAM. Each 16 bit receive data RAM location will
;have a leading zero, 12 bits of conversion result and three zeros.
;
;Receive RAM Bits 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
;A/D Result
0 MSB
LSB 0 0 0
***** Initialize the QSPI Registers ******
PSHA
PSHB
LDAA #%01111000
STAA QPDR
;idle state for PCS0-3 = high
LDAA #%01111011
STAA QPAR
;assign port D to be QSPI
LDAA #%01111110
STAA QDDR
;only MISO is an input
LDD #$8008
STD SPCR0
;master mode,16 bits/transfer,
;CPOL=CPHA=0,1MHz Ser Clock
LDD #$0000
STD SPCR1
;set delay between PCS0 and SCK,
Figure 20. MAX186/MAX188 Assembly-Code Listing
______________________________________________________________________________________
21

MAX186DC/D PDF文件相關(guān)型號(hào)

MAX186EVKIT,MAX187BC/D

MAX186DC/D 產(chǎn)品屬性

  • Maxim Integrated Products

  • 1

  • 8

  • SAR

  • 133 KSPs

  • 12 bit

  • Single Ended, Differential

  • 4-Wire (SPI, Microwire, QSPI, TMS320)

  • 4.096 V

  • 6 V

  • - 0.3 V

  • 640 mW

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