Intel386™ EX EMBEDDED PROCESSOR USER’S MANUAL
10-2
Therefore, the OUTn signals can drive external devices, generate interrupt requests, initiate DMA transactions or combinations of t he three.Each counter operates independently. Six different counting modes are available and two countformats: binary (16 bits) or BCD (4 decades). Each operating mode allows you to program thecounter with an initial count and to change this value “o n the fly.” You can determine the countand status of each counter without disturbing its current operation.

Figure 10-1. Timer/Counter Unit Signal Connections

OUT0
OUT1
CLKIN0
0
1
PSCLK
TMRCLK0
0
1
VCC
TMRGATE0
0
1
TMRCLK1
0
1
TMRGATE1
0
1
TMRCLK2
0
1
TMRGATE2
GATE0
CLKIN1
GATE1
CLKIN2
GATE2
OUT2
Control Logic
A2317-02
TMRCFG.5
TMRCFG.4
TMRCFG.3
TMRCFG.2
TMRCFG.1
TMRCFG.0
TMRCFG.7
PINCFG.5
TMROUT2
To ICU
(Slave IR3)
To DMA 
Ch1 MUX
P3CFG.1
To ICU
(Slave IR2)
To DMA 
Ch0 MUX
TMROUT1
P3CFG.0
To ICU
(Master IR0)
TMROUT0
S
y
s
t
e
m
B
u
s

V

CC
VCC
PSCLK

PSCLK

PINCFG.5
PINCFG.5
TMRCFG.6
0
1
TMRCFG.6
0
1
0
1
TMRCFG.6