Z86C83 datasheet(21/46 Pages) ZILOG

21 / 46 page

Z86C83/C84

® MCU Microcontrollers

DS96DZ80203

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"

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).

Figure 13. Port Conﬁguration Register (PCON) (Write-Only)

Figure 14. Port 3 P34 Output Conﬁguration

Comparator

Output Port 3

0 P34 Standard Output

1 P34 Comparator Output

Reserved (Must be 1.)

PCON (F) 00

* Default setting from Stop-Mode Recovery,

Power-On Reset, and any WDT Reset.

0 Port 0 Open-Drain

1 Port 0 Push-Pull*

Reserved (Must be 1.)

P34 OUT

P31

REF (P33)

P34

PAD

PCON

* Reset Condition

Normal

0 P34 Standard Output

1 P34 Comparator Output

AN1

Z86C83 Datasheet(PDF) 21 Page - Zilog, Inc.