Z86C83 Datasheet, PDF (21/46 Pages) Zilog, Inc. – Z8 MCU MICROCONTROLLERS

Z86C83/C84
Z8^® MCU Microcontrollers
PIN FUNCTIONS (Continued)
Port Configuration Register (PCON). The PCON con-
figures the ports individually for comparator output on Port
3. The PCON Register is located in the Expanded Register
File at Bank F, location 00 (Figure 13).
Bit 0 multiplexes comparator AN1 Output at P34. A "1" in
this location brings the comparator output to P34
(Figure 14), and a "0" puts P34 into its standard I/O
configuration.
Note: Only comparator output AN1 is multiplexed to a
Port 3 output. Comparator AN2 output is not connected to
any pins. Note that the PCON Register is reset upon the
occurrence of a WDT RESET (not in Stop Mode), and
Power-On Reset (POR).
PCON (F) 00
D7 D6 D5 D4 D3 D2 D1 D0
Comparator
Output Port 3
0 P34 Standard Output*
1 P34 Comparator Output
Reserved (Must be 1.)
0 Port 0 Open-Drain
1 Port 0 Push-Pull*
Reserved (Must be 1.)
* Default setting from Stop-Mode Recovery,
Power-On Reset, and any WDT Reset.
Figure 13. Port Configuration Register (PCON) (Write-Only)
P34 OUT
AN1
P31
+
-
REF (P33)
Normal
PCON
D0
* ^{0 P34 Standard Output}
1 P34 Comparator Output
* ^{Reset Condition}
Figure 14. Port 3 P34 Output Configuration
P34
PAD
21
DS96DZ80203