MCP19124 datasheet(112/236 Pages) MICROCHIP

112 / 236 page

MCP19124/5

DS20005619A-page 112

 2016 Microchip Technology Inc.

17.2.4

PORTGPB FUNCTIONS AND

OUTPUT PRIORITIES

Each PORTGPB pin is multiplexed with other functions.

The pins, their combined functions and their output

priorities are shown in Table 17-3. For additional

information, refer to the appropriate section in this data

sheet.

GPB0 pin in the PORTGPB register is a true open-drain

pin with no connection back to VDD.

When multiple outputs are enabled, the actual pin

control goes to the peripheral with the highest priority.

Analog input functions, such as ADC, and some digital

input functions are not included in the list below. These

inputs are active when the I/O pin is set for Analog

mode using the ANSELB register. Digital output

functions may control the pin when it is in Analog mode,

with the priority shown in Table 17-3.

TABLE 17-3:

PORTGPB OUTPUT

PRIORITY

Pin Name

Function Priority (1)

GPB0

GPB0 (open-drain input/output)

SDA

GPB1

VREF2

GPB4

GPB4 (MCP19125 only)

ICSPDAT

GPB5

GPB5 (MCP19125 only)

GPB6

GPB6 (MCP19125 only)

GPB7

GPB7 (MCP19125 only)

CCD2

Note 1: Output function priority listed from lowest

to highest.

PORTGPB: PORTGPB REGISTER

R/W-x

U-0

R/W-x

GPB7 (1)

GPB6 (1)

GPB5 (1)

GPB4 (1)

—

GPB1

GPB0

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

u = bit is unchanged

x = Bit is unknown

-n = Value at POR

‘1’

= Bit is set

‘0’

= Bit is cleared

bit 7-4

GPB<7:4>: General-Purpose I/O Pin bits

= Port pin is > VIH

= Port pin is < VIL

bit 3-2

Unimplemented: Read as ‘0’

bit 1-0

GPB<1:0>: General-Purpose I/O Pin bits

= Port pin is > VIH

= Port pin is < VIL

Note 1: MCP19125 only.

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