Intel 386 User Manual

Intel386™ EX EMBEDDED MICROPROCESSOR USER’S MANUAL
5-34
Table 5-9. Pin Configuration Register Design Woksheet
Bit # P1CFG Value Bit # P2CFG Value Bit # P3CFG Value
7 0 =P1.7 7 0 =P2.7 7 0 =P3.7
1 = HLDA 1 = CTS0# 1 = COMCLK
6 0 =P1.6 6 0 =P2.6 6 0 =P3.6
1 = HOLD 1 = TXD0 1 = PWRDOWN
5 0 =P1.5 5 0 =P2.5 5 0 =P3.5
1 = LOCK# 1 = RXD0 1 = INT3
4 0 =P1.4 4 0 =P2.4 4 0 =P3.4
1 = RIO# 1 = CS4# 1 = INT2
3 0 =P1.3 3 0 =P2.3 3 0 =P3.3
1 = DSR0# 1 = CS3# 1 = INT1
2 0 =P1.2 2 0 =P2.2 2 0 =P3.2
1 = DTR0# 1 = CS2# 1 = INT0
1 0 =P1.1 1 0 =P2.1 1 0 =P3.1
1 = RTS0# 1 = CS1# 1 = mux
0 0 =P1.0 0 0 =P2.0 0 0 =P3.0
1 = DCD0# 1 = CS0# 1 = mux
Bit # PINCFG Value Pins w/o Muxes X Pins w/o Muxes X
7 Reserved
DRQ0 TMRCLK0
6 0 = CS6# DCD1# INT4
1 = REFRESH# DRQ1 TMRGATE0
5 0 = Coprocessor Sigs.
1
RXD1 INT5
1 = TMR2 Signals
2
DSR1# TMRCLK1
4 0 = DACK0# STXCLK INT6
1 = CS5# RI1# TMRGATE1
3 0 = EOP# SSIORX INT7
1 = CTS1#
2 0 = DACK1#
1 = TXD1 NOTES:
1 0 = SRXCLK
1
PEREQ, BUSY#, ERROR#
1 = DTR1#
2
TMROUT2, TMRCLK2, TMRGATE2
0 0 = SSIOTX
1 = RTS1#

Intel 386 Specifications

General

Architecture	x86
Clock Speed	12 MHz to 40 MHz
Transistor Count	275, 000
Data Bus Width	32-bit
Address Bus Width	32-bit
Instruction Set	x86
Introduced	1985
Maximum Memory	4 GB
Operating Modes	Real mode, Protected mode, Virtual 8086 mode
MMU	Yes
Voltage	5V
Model	Intel 386
Package	PGA
Process	1.5 μm to 1 μm