Intel 386 User Manual

Intel386™ EX EMBEDDED MICROPROCESSOR USER’S MANUAL
5-36
Table 5-11. TMRCFG Register Design Worksheet
Bit # TMRCFG Value
7 0 = All clock inputs enabled
1 = CLK2, CLK1, CLK0 forced to 0
6 0 = Connects GATE
n to either the V
CC
pin or the TMRGATE n pin.
1 = Turns GATEn on or off, depending on whether bits 1, 3, and 5 are set or clear.
5 0 = With bit 6 clear: V
CC
to GATE2; with bit 6 set: GATE2 off.
1 = With bit 6 clear: TMRGATE2 pin conn. to GATE2; with bit 6 set: GATE2 on.
4 0 = PSCLK connected to CLK2
1 = TMRCLK2 connected to CLK2
3 0 = With bit 6 clear: V
CC
to GATE1; with bit 6 set: GATE1 turned off.
1 = With bit 6 clear: TMRGATE1 pin conn. to GATE1; with bit 6 set: GATE1 on.
2 0 = PSCLK connected to CLK1
1 = TMRCLK1 connected to CLK1
1 0 = With bit 6 clear: V
CC
to GATE0; with bit 6 set: GATE0 turned off.
1 = With bit 6 clear: TMRGATE0 pin conn. to GATE0; with bit 6 set: GATE0 on.
0 0 = PSCLK connected to CLK0
1 = TMRCLK0 connected to CLK0

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