
2009 Microchip Technology Inc.
DS39663F-page 25
PIC18F87J10 FAMILY
PORTJ is a bidirectional I/O port.
RJ0/ALE
RJ0
ALE
62
I/O
O
ST
—
Digital I/O.
External memory address latch enable.
RJ1/OE
RJ1
OE
61
I/O
O
ST
—
Digital I/O.
External memory output enable.
RJ2/WRL
RJ2
WRL
60
I/O
O
ST
—
Digital I/O.
External memory write low control.
RJ3/WRH
RJ3
WRH
59
I/O
O
ST
—
Digital I/O.
External memory write high control.
RJ4/BA0
RJ4
BA0
39
I/O
O
ST
—
Digital I/O.
External memory byte address 0 control.
RJ5/CE
RJ5
CE
40
I/O
O
ST
—
Digital I/O
External memory chip enable control.
RJ6/LB
RJ6
LB
41
I/O
O
ST
—
Digital I/O.
External memory low byte control.
RJ7/UB
RJ7
UB
42
I/O
O
ST
—
Digital I/O.
External memory high byte control.
VSS
11, 31, 51, 70
P
—
Ground reference for logic and I/O pins.
VDD
32, 48, 71
P
—
Positive supply for peripheral digital logic and I/O pins.
AVSS
26
P
—
Ground reference for analog modules.
AVDD
25
P
—
Positive supply for analog modules.
ENVREG
24
I
ST
Enable for on-chip voltage regulator.
VDDCORE/VCAP
VDDCORE
VCAP
12
P
—
Core logic power or external filter capacitor connection.
Positive supply for microcontroller core logic
(regulator disabled).
External filter capacitor connection (regulator enabled).
TABLE 1-4:
PIC18F8XJ10/8XJ15 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number
Pin
Type
Buffer
Type
Description
TQFP
Legend:
TTL
= TTL compatible input
CMOS
= CMOS compatible input or output
ST
= Schmitt Trigger input with CMOS levels
Analog
= Analog input
I
= Input
O
= Output
P
= Power
OD
= Open-Drain (no P diode to VDD)
I2C/SMB = I2C/SMBus input buffer
Note 1:
Alternate assignment for ECCP2/P2A when Configuration bit, CCP2MX, is cleared (Extended Microcontroller mode).
2:
Default assignment for ECCP2/P2A for all devices in all operating modes (CCP2MX is set).
3:
Default assignments for P1B/P1C/P3B/P3C (ECCPMX Configuration bit is set).
4:
Alternate assignment for ECCP2/P2A when CCP2MX is cleared (Microcontroller mode).
5:
Alternate assignments for P1B/P1C/P3B/P3C (ECCPMX Configuration bit is cleared).