
2007 Microchip Technology Inc.
DS39599G-page 115
PIC18F2220/2320/4220/4320
FIGURE 10-16:
PARALLEL SLAVE PORT WRITE WAVEFORMS
FIGURE 10-17:
PARALLEL SLAVE PORT READ WAVEFORMS
TABLE 10-11: REGISTERS ASSOCIATED WITH PARALLEL SLAVE PORT
Q1
Q2
Q3
Q4
CS
Q1
Q2
Q3
Q4
Q1
Q2
Q3
Q4
WR
RD
IBF
OBF
PSPIF
PORTD<7:0>
Q1
Q2
Q3
Q4
CS
Q1
Q2
Q3
Q4
Q1
Q2
Q3
Q4
WR
IBF
PSPIF
RD
OBF
PORTD<7:0>
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR, BOR
Value on
all other
Resets
PORTD
Port Data Latch when written; Port pins when read
xxxx xxxx
uuuu uuuu
LATD
LATD Data Latch bits
xxxx xxxx
uuuu uuuu
TRISD
PORTD Data Direction bits
1111 1111
PORTE
—
RE3
RE2
RE1
RE0
---- qxxx
---- quuu
LATE
—
LATE Data Latch bits
---- -xxx
---- -uuu
TRISE
IBF
OBF
IBOV
PSPMODE
—
PORTE Data Direction bits
0000 -111
INTCON
GIE/
GIEH
PEIE/
GIEL
TMR0IF
INT0IE
RBIE
TMR0IF
INT0IF
RBIF
0000 000x
0000 000u
PIR1
PSPIF
ADIF
RCIF
TXIF
SSPIF
CCP1IF
TMR2IF
TMR1IF
0000 0000
PIE1
PSPIE
ADIE
RCIE
TXIE
SSPIE
CCP1IE
TMR2IE
TMR1IE
0000 0000
IPR1
PSPIP
ADIP
RCIP
TXIP
SSPIP
CCP1IP
TMR2IP
TMR1IP
1111 1111
ADCON1
—
VCFG1
VCFG0
PCFG3
PCFG2
PCFG1
PCFG0
--00 0000
Legend:
x = unknown, u = unchanged, - = unimplemented, read as ‘0’. Shaded cells are not used by the Parallel Slave Port.