Datasheet

© 2009 Microchip Technology Inc. DS39632E-page 193
PIC18F2455/2550/4455/4550
FIGURE 18-2: TIMING FOR MICROCONTROLLER WRITE ADDRESS, WRITE DATA AND
READ DATA (NO WAIT STATES)
FIGURE 18-3: TIMING FOR USB WRITE ADDRESS AND DATA (4 WAIT STATES)
FIGURE 18-4: TIMING FOR USB WRITE ADDRESS AND READ DATA (4 WAIT STATES)
FOSC/4
OESPP
CK1SPP
CK2SPP
CSSPP
SPP<7:0>
MOVWF SPPEPS MOVWF SPPDATA
Write Address
Write Data
MOVF SPPDATA, W
Read Data
ADDR DATA DATA
USB Clock
OESPP
CK1SPP
CK2SPP
CSSPP
SPP<7:0>
2 Wait States
2 Wait States
2 Wait States
2 Wait States
Write DataWrite Address
USB Clock
OESPP
CK1SPP
CK2SPP
CSSPP
SPP<7:0>
Write Address Read Data
2 Wait States
2 Wait States
2 Wait States
2 Wait States