Intel 80C188XL, 80C186XL user manual Timers‚ See Timer Counter Unit TCU, Index-7

SI register, 2-1, 2-5, 2-13, 2-22, 2-23, 2-30, 2-32, 2-34

Sign Flag (SF), 2-7, 2-9

Single-step trap (Type 1 exception), 2-43 Software

code example

80C187 floating-point routine, 10-16

80C187 initialization, 10-13–10-15 digital one-shot, 9-17–9-23 DMA initialization, 10-22–10-27 ICU initialization, 8-31 real-time clock, 9-17–9-19 square-wave generator, 9-17–9-22 TCU configurations, 9-17–9-23 timed DMA transfers, 10-22–10-27

data types, 2-37, 2-38

dynamic code relocation, 2-13, 2-14 interrupts, 2-45

overview, 2-17

See also Addressing modes, Instruction set Square-wave generator, code example, 9-17–9-22 SRDY, See READY

SSregister, 2-1, 2-5, 2-6, 2-13, 2-15, 2-30, 2-45 Stack frame pointers, A-2

Stack Pointer, 2-1, 2-5, 2-13, 2-15, 2-45 Stack segment, 2-5

Stacks, 2-15

START registers, CSU, 6-6, 6-7 STOP registers, CSU, 6-6, 6-8 String instructions, 2-22–2-23

and addressing modes, 2-34

and memory-mapped I/O ports, 2-36 operand locations, 2-13 operands, 2-36

Strings

accessing, 2-13, 2-34 defined, 2-37

Synchronizing asynchronous inputs, B-1

T

Technical support, 1-6 Temporary real, defined, 10-7 Terminology

"above" vs "greater", 2-26 "below" vs "less", 2-26 device names, 1-2

Timer Control Registers (TxCON), 9-7, 9-8

INDEX

Timer Count Registers (TxCNT), 9-10 Timer Counter Unit (TCU), 9-1–9-23

application examples, 9-17–9-23 block diagram, 9-2

clock sources, 9-12

configuring a digital one-shot, 9-17–9-23 configuring a real-time clock, 9-17–9-19 configuring a square-wave generator, 9-17–

9-22

counting sequence, 9-12–9-13 dual maxcount mode, 9-13–9-14 enabling and disabling counters, 9-15–9-16 frequency, maximum, 9-17

initializing, 9-11

input synchronization, 9-17 interrupts, 9-16 overview, 9-1–9-6 programming, 9-6–9-16

considerations, 9-16 pulsed output, 9-14–9-15 retriggering, 9-13–9-14 setup and hold times, 9-16

single maxcount mode, 9-13, 9-14–9-16 timer delay, 9-1

timing, 9-1

and BIU, 9-1 considerations, 9-16 TxOUT signal, 9-15

variable duty cycle output, 9-14–9-15 Timer Maxcount Compare Registers (TxCMPA,

TxCMPB), 9-11

Timers‚ See Timer Counter Unit (TCU)

Training, 1-7

Trap exceptions, 2-43

Trap Flag (TF), 2-7, 2-9, 2-43, 2-48 T-state

and bus cycles, 3-9 and CLKOUT, 3-8 defined, 3-7

W

Wait states

and bus cycles, 3-13

and bus ready inputs, 3-13 and chip-selects, 6-15–6-17 and DRAM controllers, 7-1

Index-7