Intel386™ EX MICROPROCESSOR USER’S MANUAL
xviii
FIGURES
Figure Page
10-7 Mode 1 – Writing a New Count.................................................................................10-10
10-8 Mode 2 – Basic Operation........................................................................................10-11
10-9 Mode 2 – Disabling the Count..................................................................................10-11
10-10 Mode 2 – Writing a New Count.................................................................................10-12
10-11 Mode 3 – Basic Operation (Even Count)..................................................................10-13
10-12 Mode 3 – Basic Operation (Odd Count)...................................................................10-14
10-13 Mode 3 – Disabling the Count ..................................................................................10-14
10-14 Mode 3 – Writing a New Count (With a Trigger).......................................................10-15
10-15 Mode 3 – Writing a New Count (Without a Trigger)..................................................10-15
10-16 Mode 4 – Basic Operation........................................................................................10-16
10-17 Mode 4 – Disabling the Count ..................................................................................10-17
10-18 Mode 4 – Writing a New Count.................................................................................10-17
10-19 Mode 5 – Basic Operation........................................................................................10-18
10-20 Mode 5 – Retriggering the Strobe ............................................................................10-19
10-21 Mode 5 – Writing a New Count Value ......................................................................10-19
10-22 Timer Configuration Register (TMRCFG).................................................................10-21
10-23 Port 3 Configuration Register (P3CFG)....................................................................10-22
10-24 Pin Configuration Register (PINCFG).......................................................................10-23
10-25 Timer Control Register (TMRCON – Control Word Format).....................................10-25
10-26 Timer
n
Register (TMR
n
– Write Format).................................................................10-26
10-27 Timer Control Register (TMRCON – Counter-latch Format) ....................................10-28
10-28 Timer
n
Register (TMR
n
– Read Format).................................................................10-29
10-29 Timer Control Register (TMRCON – Read-back Format) ........................................10-30
10-30 Timer
n
Register (TMR
n
– Status Format) ...............................................................10-32
11-1 Serial I/O Unit 1 Configuration....................................................................................11-2
11-2 SIO
n
Baud-rate Generator Clock Sources.................................................................11-4
11-3 SIO
n
Transmitter ........................................................................................................11-7
11-4 SIO
n
Data Transmission Process Flow......................................................................11-8
11-5 SIO
n
Receiver............................................................................................................11-9
11-6 SIO
n
Data Reception Process Flow.........................................................................11-11
11-7 Pin Configuration Register (PINCFG).......................................................................11-17
11-8 Port 1 Configuration Register (P1CFG)....................................................................11-18
11-9 Port 2 Configuration Register (P2CFG)....................................................................11-19
11-10 Port 3 Configuration Register (P3CFG)....................................................................11-20
11-11 SIO and SSIO Configuration Register (SIOCFG).....................................................11-21
11-12 Divisor Latch Registers (DLL
n
and DLH
n
) ...............................................................11-22
11-13 Transmit Buffer Register (TBR
n
)..............................................................................11-23
11-14 Receive Buffer Register (RBR
n
)...............................................................................11-24
11-15 Serial Line Control Register (LCR
n
).........................................................................11-25
11-16 Serial Line Status Register (LSR
n
)...........................................................................11-26
11-17 Interrupt Enable Register (IER
n
) ..............................................................................11-27
11-18 Interrupt ID Register (IIR
n
) .......................................................................................11-28
11-19 Modem Control Signals – Diagnostic Mode Connections ........................................11-29
11-20 Modem Control Signals – Internal Connections.......................................................11-29
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