Intel 386

INTEL386™ EX MICROPROCESSOR USER’S MANUAL
Index-6
register locations, 4-5, 4-15
Peripherals, summary, 2-3
Physical address space, 3-1
Pin configuration, 5-23
PINCFG, 5-24, 10-23, 11-17, 12-31, 13-17,
14-15, D-46
Pin descriptions, A-1–A-10
Pin states after reset and during idle, powerdown,
and hold,
A-9
Pipelined instructions, defined, 3-2
Port configuration
P1CFG,
5-25, 11-18, D-43
P2CFG, 5-26, 11-19, 14-16, D-44
P3CFG, 5-27, 9-18, 10-22, 11-20, D-45
PnCFG, 16-7
PnDIR, 16-8, D-47
PnLTC, 16-8, D-48
PnPIN, 16-9, D-48
PORT92, 5-22, D-50
PORT92
register addresses,
4-17, D-3
Power management
controlling modes,
8-8, 17-4–17-6
logic, 8-3–8-7
programming
PWRCON,
8-8, 17-11, D-51
register addresses, 4-19, D-5
See also Idle mode, powerdown mode, system
management mode
Powerdown mode
considerations,
8-13
SMM interaction with, 8-5
timing diagram, 8-11
Powerup
Built-in self-test,
8-12
JTAG reset, 8-12
Prefetch Queue, 3-4
Priority of exceptions and interrupts, 7-7
Programmed operating mode, 9-8
Programming
chip-select unit,
14-13–14-20
clock and power management unit, 8-7–8-10
DMA controller, 12-28–12-51
ESE bit, 4-8
interrupt control unit, 9-32
RCU, 15-6–15-10
REMAPCFG example, 4-8
serial I/O unit, 11-15–11-32
SSIO, 13-17–13-25
timer/counter unit, 10-20–10-33
watchdog timer unit, 17-7–17-12
Programming considerations
chip-select unit,
14-22
DMA controller, 12-50
serial I/O unit, 11-32
timer/counter unit, 10-33
Protected mode, 9-8
Protection Test Unit, 3-5
PSCLK, 8-1–8-2, 8-7, 10-1, 10-3, 10-21, 13-1,
13-5, 13-18
PSCLK frequency
Controlling,
8-7
PSRAM, 15-11
R
RAS#-only refresh, 15-1, 15-12
RCU, See Refresh control unit
Ready logic,
6-10
Real mode, 9-8
Refresh control unit, 15-1–15-16
bus arbitration, 15-5
configuring, 5-3
connections, 15-3
design considerations, 15-11
dynamic memory control, 15-1
operation, 15-5
overview, 15-2–15-5
programming, 15-6–15-10
RFSADD, 15-10, D-54
RFSADD register, 15-10
RFSBAD, 15-9, D-54
RFSBAD register, 15-9
RFSCIR, 15-7, D-55
RFSCIR register, 15-7
RFSCON, 15-8, D-55
RFSCON register, 15-8
refresh addresses, 15-4
refresh intervals, 15-4
refresh methods, 15-1