18F8680 datasheet(150/496 Pages) MICROCHIP

150 / 496 page

PIC18F6585/8585/6680/8680

DS30491C-page 148

 2004 Microchip Technology Inc.

TABLE 10-15: PORTH FUNCTIONS

TABLE 10-16: SUMMARY OF REGISTERS ASSOCIATED WITH PORTH

Name

Bit#

Buffer Type

Function

RH0/A16

bit 0

ST/TTL(1)

Input/output port pin or address bit 16 for external memory interface.

RH1/A17

bit 1

ST/TTL(1)

Input/output port pin or address bit 17 for external memory interface.

RH2/A18

bit 2

ST/TTL(1)

Input/output port pin or address bit 18 for external memory interface.

RH3/A19

bit 3

ST/TTL(1)

Input/output port pin or address bit 19 for external memory interface.

RH4/AN12

bit 4

Input/output port pin or analog input channel 12.

RH5/AN13

bit 5

Input/output port pin or analog input channel 13.

RH6/AN14/P1C(2)

bit 6

Input/output port pin or analog input channel 14.

RH7/AN15/P1B(2)

bit 7

Input/output port pin or analog input channel 15.

Legend: ST = Schmitt Trigger input, TTL = TTL input

Note 1:

Input buffers are Schmitt Triggers when in I/O mode and TTL buffers when in System Bus or Parallel Slave

Port mode.

Alternate pin assignment when ECCPMX configuration bit is cleared.

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Value on:

POR, BOR

Value on

all other

Resets

TRISH

PORTH Data Direction Control Register

1111 1111

PORTH

Read PORTH pin/Write PORTH Data Latch

xxxx xxxx

uuuu uuuu

LATH

Read PORTH Data Latch/Write PORTH Data Latch

xxxx xxxx

uuuu uuuu

ADCON1

—

VCFG1 VCFG0 PCFG3 PCFG2 PCFG1 PCFG0

--00 0000

MEMCON(1)

EBDIS

—

WAIT1

WAIT0

—

WM1

WM0

0-00 --00

Legend: x = unknown, u = unchanged, – = unimplemented. Shaded cells are not used by PORTH.

Note 1:

This register is held in Reset in Microcontroller mode.

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