Using the 93LC56 and 93LC66
0253
0254
0255
0056
0057
0058
0A52
0525
0A5A
goto
bsf
goto
polltop
; no, check again
port_a,timeout; yes, set timeout LED and go on
badpoll
;
Mon Jun 06 10:49:00 1994
Page 6
16c5x/7x Cross-Assembler V4.12 Released
Line
0256
0257
0258
0259
0260
0261
0262
0263
0264
0265
0266
0267
0268
0269
0270
0271
0272
0273
0274
0275
0276
0277
0278
0279
0280
0281
0282
0283
0284
0285
0286
0287
0288
0289
0290
0291
0292
0293
0294
PC
Opcode
0059
005A
005B
005C
005D
0425
0486
02AC
02F3
0A3C
okpoll
badpoll
bcf
bcf
incf
decfsz
goto
port_a,timeout;
port_b,chpsel ;
addr
;
bytcnt
;
topwr
;
;
clear the timeout LED
chip sel line back low
increment address counter
all bytes written?
no, do another
yes, go on
005E
005F
0060
0061
0062
0063
0064
0065
0066
0067
0068
0069
006A
006B
0907
0C02
0032
0C00
0030
091C
0C08
0032
0C00
0030
091C
0486
0000
0A2B
;
;
Now continue on to the erase/write disable command
;
;****************************************************************
;
EWDS (Erase/Write Disable Routine)
;
This routine executes the erase/write disable command
;
which prevents the contents of the array from being
;
written to.
;
;****************************************************************
EWDS
;
call
BSTART
; generate a start bit
;
movlw
.2
; set # bits to 2
movwf
bits
;
movlw
b’00000000'
; get the opcode (00b)
movwf
txbuf
; into the output buffer
call
TX
; and transmit it
movlw
.8
; set # bits to 8
movwf
bits
;
movlw
b’00000000'
; get opcode and address
;
(00XXXXXX)
movwf
txbuf
; into output buffer
call
TX
; and transmit it
bcf
port_b,chpsel ; set chip select line low
nop
goto
EWEN
; start all over
;
;
END
0000
8
© 1994 Microchip Technology Inc.
DS00560D-page 15
8-113
MICROCHIP [ MICROCHIP TECHNOLOGY ]
