D301 datasheet(241/416 Pages) MICROCHIP

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DS30010118D-page 241

PIC24FJ256GA705 FAMILY

TABLE 20-2:

ENHANCED PARALLEL MASTER PORT PIN DESCRIPTIONS

Pin Name

(Alternate Function)

Type

Description

PMA<22:16>

Address Bus bits<22:16>

PMA14

Address Bus bit 14

I/O

Data Bus bit 14 (16-bit port with Multiplexed Addressing)

(PMCS1)

Chip Select 1 (alternate location)

PMA<13:8>

Address Bus bits<13:8>

I/O

Data Bus bits<13:8> (16-bit port with Multiplexed Addressing)

PMA<7:3>

Address Bus bits<7:3>

PMA2

(PMALU)

Address Bus bit 2

Address Latch Upper Strobe for Multiplexed Address

PMA1

(PMALH)

I/O

Address Bus bit 1

Address Latch High Strobe for Multiplexed Address

PMA0

(PMALL)

I/O

Address Bus bit 0

Address Latch Low Strobe for Multiplexed Address

PMD<15:8>

I/O

Data Bus bits<15:8> (Demultiplexed Addressing)

PMD<7:4>

I/O

Data Bus bits<7:4>

Address Bus bits<7:4> (4-bit port with 1-Phase Multiplexed Addressing)

PMD<3:0>

I/O

Data Bus bits<3:0>

PMCS1

Chip Select 1

PMCS2

Chip Select 2

PMWR

I/O

Write Strobe(1)

(PMENB)

I/O

Enable Signal(1)

PMRD

I/O

Read Strobe(1)

(PMRD/PMWR)

I/O

Read/Write Signal(1)

PMBE1

Byte Indicator

PMBE0

Nibble or Byte Indicator

PMACK1

Acknowledgment Signal 1

PMACK2

Acknowledgment Signal 2

Note 1:

Signal function depends on the setting of the MODE<1:0> and SM bits (PMCON1<9:8> and

PMCSxCF<8>).

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