PIC18F44J10-ESLASHML datasheet(344/358 Pages) MICROCHIP

344 / 358 page

PIC18F45J10 FAMILY

DS39682C-page 342

Preliminary

B.1

Power Requirement Differences

The

most

significant

difference

between

the

PIC18F45J10 family and PIC18F4520 device families

is the power requirements. PIC18F45J10 family

devices are designed on a smaller process; this results

in lower maximum voltage and higher leakage current.

The operating voltage range for PIC18F45J10 family

devices is 2.0V to 3.6V. One of the VDD pins is separated

for the core logic supply (VDDCORE). This pin has specific

voltage and capacitor requirements as described in

Section 23.0 “Electrical Characteristics”.

The current specifications for PIC18F45J10 family

devices are yet to be determined.

B.2

Pin Differences

There are several differences in the pinouts between

the PIC18F45J10 family and the PIC18F4520 families:

• Input voltage tolerance

• Output current capabilities

• Available I/O

Pins on the PIC18F45J10 family that have digital only

input capability will tolerate voltages up to 5.5V and are

thus tolerant to voltages above VDD. Table 9-1 in

Section 9.0 “I/O Ports” contains the complete list.

In addition to input differences, there are output differ-

ences as well. Not all I/O pins can source or sink equal

levels of current. Only PORTB and PORTC support the

25 mA source/sink capability that is supported by all

output

pins

the

PIC18F4520.

Table 9-2

Section 9.0 “I/O Ports” contains the complete list of

output capabilities.

There are additional differences in how some pin func-

tions

are

implemented

PIC18F45J10

family

devices. First, the OSC1/OSC2 oscillator pins are

strictly dedicated to the external oscillator function;

there is no option to re-allocate these pins to I/O (RA6

or RA7) as on PIC18F4520 devices. Second, the

MCLR pin is dedicated only to MCLR and cannot be

configured as an input (RE3). Finally, RA4 does not

exist on PIC18F45J10 family devices.

All of these pin differences (including power pin

differences) should be accounted for when making a

conversion between PIC18F4520 and PIC18F45J10

family devices.

B.3

Oscillator Differences

PIC18F4520 family devices have a greater range of

oscillator options than PIC18F45J10 family devices.

The latter family is limited primarily to operating modes

that support HS and EC oscillators.

In addition, the PIC18F45J10 family has an internal RC

oscillator with only a fixed 32 kHz output. The higher

frequency RC modes of the PIC18F4520 family are not

available.

B.4

Peripherals

The PIC18F45J10 family is able to operate at 40 MHz

down to 2.15 volts unlike the PIC18F4520 family where

40 MHz operation is limited to 4.2 +V applications.

Peripherals must also be considered when making a

conversion between the PIC18F45J10 family and the

PIC18F4520 families:

• Data EEPROM: PIC18F45J10 family devices do

not have this module.

• BOR: PIC18F45J10 family devices do not have a

programmable BOR. Simple brown-out capability

is provided through the use of the internal voltage

regulator (not available in PIC18LFXXJ10

devices).

• LVD: PIC18F45J10 family devices do not have

this module.

• Timer3 (TMR3) has been removed from the

PIC18F45J10 family.

• The T0CKI/C1OUT pins have been moved from

RA4 to RB5.

• The 40/44-pin devices in the PIC18F45J10 family

have a second MSSP module available on pins

RD0:RD3

PIC18F44J10-E/ML Datasheet(PDF) 344 Page - Microchip Technology

PIC18F44J10-E/ML Datasheet(HTML) 344 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL