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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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93LC66 Datasheet(PDF) 19 Page - Microchip Technology |
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93LC66 Datasheet(HTML) 19 Page - Microchip Technology |
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19 / 22 page  © 1994 Microchip Technology Inc. DS00560D-page 19 Using the 93LC56 and 93LC66 8 0189 ; 0190 0040 0C11 movlw b’00010001' 0191 0041 0005 tris port_a ; set RA0 as input, rest output 0192 0042 0065 clrf port_a ; all lines low 0193 0043 0C80 movlw b’10000000' 0194 0044 0006 tris port_b ; set RB7 as input, rest output; 0195 ; 0196 ; Fall through and do the read 0197 ; 0198 ;********************************************************************* 0199 ; READ ROUTINE (Sequential read mode) 0200 ; This routine reads 8 consecutive addresses in 0201 ; sequential mode starting at address 0. This 0202 ; program will repeat forever 0203 ;********************************************************************* 0204 READ 16c5x/7x Cross-Assembler V4.12 Released Mon Jun 06 10:49:20 1994 Page 5 Line PC Opcode 0205 ; 0206 0045 0C00 movlw .0 ; set starting address to 00 0207 0046 002C movwf addr ; 0208 0047 0C08 movlw .8 ; set number of addresses to 0209 0048 0033 movwf bytcnt ; read as 8 0210 ; 0211 0049 090E call BSTART ; generate the start bit 0212 004A 0C02 movlw .2 ; set # bits to 2 0213 004B 0032 movwf bits ; 0214 004C 0C80 movlw b’10000000' ; get opcode (10b) 0215 004D 0030 movwf txbuf ; into output buffer 0216 004E 0936 call TX ; and transmit it 0217 004F 0C08 movlw .8 ; 0218 0050 0032 movwf bits ; set number of bits to 8 0219 0051 020C movf addr,w ; get the address 0220 0052 0030 movwf txbuf ; into the output buffer 0221 0053 0936 call TX ; and transmit it 0222 0223 0054 0921 rbyte call RX ; read the high byte 0224 0055 020D movf datai,w ; move input data to w 0225 0056 0037 movwf hbyte ; xfer it to high byte 0226 0227 0057 0921 call RX ; read the low byte 0228 0058 020D movf datai,w ; move input data to w 0229 0059 0037 movwf hbyte ; xfer it to low byte 0230 0231 005A 02AC incf addr ; add 1 to the address 0232 005B 02F3 decfsz bytcnt ; have all bytes been read? 0233 005C 0A54 goto rbyte ; no, read another byte 0234 0235 005D 0486 bcf port_b,chpsel ; yes,clear the chip select line 0236 005E 0A45 goto READ ; and start over 0237 0000 END 8-117 |
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