Microchip Technology AC164139 Data Sheet

 2010 Microchip Technology Inc.

DS39969B-page 279

PIC24FJ256DA210 FAMILY

REGISTER 19-5:

PMCSxCF: CHIP SELECT x CONFIGURATION REGISTER

R/W-0

U-0

R/W-0

CSDIS

CSP

CSPTEN

BEP

—

WRSP

RDSP

bit 15

bit 8

R/W-0

U-0

ACKP

PTSZ1

PTSZ0

—

bit 7

bit 0

Legend:
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

CSDIS: Chip Select x Disable bit

= Disable the Chip Select x functionality

= Enable the Chip Select x functionality

bit 14

CSP: Chip Select x Polarity bit

= Active-high (PMCSx)

= Active-low (PMCSx)

bit 13

CSPTEN: PMCSx Port Enable bit

= PMCSx port is enabled

= PMCSx port is disabled

bit 12

BEP: Chip Select x Nibble/Byte Enable Polarity bit

= Nibble/Byte enable active-high (PMBE0, PMBE1)

= Nibble/Byte enable active-low (PMBE0, PMBE1)

bit 11

Unimplemented: Read as ‘0’

bit 10

WRSP: Chip Select x Write Strobe Polarity bit
For Slave modes and Master mode when SM = 0:
1

= Write strobe active-high (PMWR)

= Write strobe active-low (PMWR)

For Master mode when SM = 1:
1

= Enable strobe active-high (PMENB)

= Enable strobe active-low (PMENB)

bit 9

RDSP: Chip Select x Read Strobe Polarity bit
For Slave modes and Master mode when SM = 0:
1

= Read strobe active-high (PMRD)

= Read strobe active-low (PMRD)

For Master mode when SM = 1:
1

= Read/write strobe active-high (PMRD/PMWR)

= Read/Write strobe active-low (PMRD/PMWR)

bit 8

SM: Chip Select x Strobe Mode bit

= Read/Write and enable strobes (PMRD/PMWR and PMENB)

= Read and write strobes (PMRD and PMWR)

bit 7

ACKP: Chip Select x Acknowledge Polarity bit

= ACK active-high (PMACK1)

= ACK active-low (PMACK1)

bit 6-5

PTSZ<1:0>: Chip Select x Port Size bits

= Reserved

= 16-bit port size (PMD<15:0>)

= 4-bit port size (PMD<3:0>)

= 8-bit port size (PMD<7:0>)

bit 4-0

Unimplemented: Read as ‘0’