Page 127 - Making PIC Microcontroller Instruments and Controllers

SOCKET U4-SPI SEEPROM 117

c8
0.1

(Wi
ire&Ei$ sPl SEEPRoM. ng and circuilry requi€"
ments,)

Socket U4-SPI SEEPROM

Socket U4 is wired to use SPI memory only. Figure 7.3 and Program 7.2 illusfate the
use of this memory type.

il€Wiiiiii$ilg.i Prosram to read from and wrire to sPl SEEPRoMS
, rhis nicroEngineerinq Labs prosran can be found on their
; web sile. Use lhe lalest version,
; PICBASIC PRO progr:an to lead and write to SPI SEEPROMS
; Write lo lhe f,rst 16 locations of an external serial EEPRoM
: oe.d F-sc 6 locat iors bdck and send Lo -cD lepeaLedly
; No!e. For SEEPROMS with word sized addresses
DEFTNE IOA.DER USED 1 ; allows use of the boot

; this will not affect
; normal progrm operation.
DEFINE I'D DREG PORTD
DEFINE I,CD_DBIT 4
DEFINE IJCD_RSRES PORTE
DEFINE IND_RSBIT O
DEFINE IND_EREG PORTE
DEFTNE I,CD_EBIT 1
INCIJUDE \MODEDEFS - BASZ