
SD188ES/SD188EM Demonstration Board User’s Manual
2-13
1.1
PIO Activity LED Indicators
The SD188ES/SD188EM demonstration board uses on-board LED indicators to
show activity on the upper eight programmable I/O (PIO) signals from the
Am188ES or Am188EM microcontroller. Table 2-3 shows which PIO signal is
represented by each LED.
Table 2-3. PIO LED Indicator Interface
LED
PIO Pin Name
PIO Register Bit
Number
CR3
MCS1
15
CR4
MCS0
14
CR5
DEN
5
CR6
DT/R
4
CR7
PCS5
3
CR8
PCS6
2
CR9
TMROUT1
1
CR10
TMRIN1
0
frtbook : newch2 Page 13 Monday, June 2, 1997 3:37 PM