Intel 386

Intel386™ EX EMBEDDED MICROPROCESSOR USER’S MANUAL
5-30
Table 5-4. Example Pin Configuration Registers
Bit # P1CFG Value Bit # P2CFG Value Bit # P3CFG Value
70 =P1.7 0 7 0 = P2.7 0 70 =P3.7 0
1 = HLDA 1 = CTS0# 1 = COMCLK
60 =P1.6 0 6 0 = P2.6 1 60 =P3.6 0
1 = HOLD 1 = TXD0 1 = PWRDOWN
50 =P1.5 0 5 0 = P2.5 1 50 =P3.5 0
1 = LOCK# 1 = RXD0 1 = INT3
40 =P1.4 0 4 0 = P2.4 1 40 =P3.4 0
1 = RIO# 1 = CS4# 1 = INT2
30 =P1.3 0 3 0 = P2.3 1 30 =P3.3 1
1 = DSR0# 1 = CS3# 1 = INT1
20 =P1.2 0 2 0 = P2.2 1 20 =P3.2 1
1 = DTR0# 1 = CS2# 1 = INT0
10 =P1.1 0 1 0 = P2.1 1 10 =P3.1 0
1 = RTS0# 1 = CS1# 1 = mux
00 =P1.0 0 0 0 = P2.0 0 00 =P3.0 0
1 = DCD0# 1 = CS0# 1 = mux
Bit # PINCFG Value Pins w/o Muxes X Pins w/o Muxes X
7 Reserved R
DRQ0 X TMRCLK0
6 0 = CS6# 0 DCD1# INT4 X
1 = REFRESH# DRQ1 TMRGATE0
5 0 = Coprocessor Sigs.
1
0 RXD1 X INT5 X
1 = TMR2 Signals
2
DSR1# TMRCLK1
4 0 = DACK0# 1 STXCLK X INT6 X
1 = CS5# RI1# TMRGATE1
30 =EOP# 1 SSIORX X INT7 X
1 = CTS1#
2 0 = DACK1# 1
1 = TXD1 NOTES:
1 0 = SRXCLK 1
1
PEREQ, BUSY#, ERROR#
1 = DTR1#
2
TMROUT2, TMRCLK2, TMRGATE2
0 0 = SSIOTX 1
1 = RTS1#