Z86E3016PSG Datasheet, PDF (116/348 Pages) Zilog, Inc. – Z86E3016PSG

Z8 Family of Microcontrollers
User Manual
98
Register F7h
Port 3 Mode Register (P3M)
(Write-Only)
000 0 00 0 0
0 Port 2 Open-Drain
1 Port 2 Push–Pull
0 P31, P32 Digital Mode
1 P31, P32 Analog Mode
0 P32 = Input
P35 = Output
1 P32 = DAV0/RDY0 P35 = RDY0/DAV0
00 P33 = Input
P34 = Output
01 P33 = Input
P34 = DM
10 P33 = Input
P34 = DM
11 P33 = DAV1/RDY1 P34 = RDY1/DAV1
0 P31 = Input
P36 = Output
1 P32 = DAV2/RDY2 P36 = RDY2/DAV2
0 P30 = Input
1 P30 = Serial In
P37 = Output
P37 = Serial Out
0 Parity OFF
1 Parity ON
Figure 56. Port 3 Mode Reset
Analog Comparators
Select Z8 devices include two independent on-chip analog comparators.
See the device product specification for feature availability and use. Port
3, Pins P31 and P32 each have a comparator front end. The comparator
reference voltage, pin P33, is common to both comparators. In analog
mode, the P31 and P32 are the positive inputs to the comparators and P33
is the reference voltage supplied to both comparators. In digital mode, pin
P33 can be used as a P33 register input or IRQ1 source. P34, P35, or P37
I/O Ports
UM001602-0904