64GA106 datasheet(206/330 Pages) MICROCHIP

206 / 330 page

PIC24FJ256GA110 FAMILY

DS39905E-page 206

 2010 Microchip Technology Inc.

PMSTAT: PARALLEL MASTER PORT STATUS REGISTER

R-0

R/W-0, HS

U-0

R-0

IBF

IBOV

—

IB3F

IB2F

IB1F

IB0F

bit 15

bit 8

R-1

R/W-0, HS

U-0

R-1

OBE

OBUF

—

OB3E

OB2E

OB1E

OB0E

bit 7

bit 0

Legend:

HS = Hardware Settable bit

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 15

IBF:

Input Buffer Full Status bit

= All writable input buffer registers are full

= Some or all of the writable input buffer registers are empty

bit 14

IBOV:

Input Buffer Overflow Status bit

= A write attempt to a full input byte register occurred (must be cleared in software)

= No overflow occurred

bit 13-12

Unimplemented:

Read as ‘0’

bit 11-8

IB3F:IB0F

Input Buffer x Status Full bits

= Input buffer contains data that has not been read (reading buffer will clear this bit)

= Input buffer does not contain any unread data

bit 7

OBE:

Output Buffer Empty Status bit

= All readable output buffer registers are empty

= Some or all of the readable output buffer registers are full

bit 6

OBUF:

Output Buffer Underflow Status bit

= A read occurred from an empty output byte register (must be cleared in software)

= No underflow occurred

bit 5-4

Unimplemented:

Read as ‘0’

bit 3-0

OB3E:OB0E

Output Buffer x Status Empty bits

= Output buffer is empty (writing data to the buffer will clear this bit)

= Output buffer contains data that has not been transmitted

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