Datasheet

 2010 Microchip Technology Inc. DS39969B-page 279
PIC24FJ256DA210 FAMILY
REGISTER 19-5: PMCSxCF: CHIP SELECT x CONFIGURATION REGISTER
R/W-0 R/W-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0
CSDIS CSP CSPTEN BEP
— WRSP RDSP SM
bit 15 bit 8
R/W-0 R/W-0 R/W-0 U-0 U-0 U-0 U-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
1 = Disable the Chip Select x functionality
0 = Enable the Chip Select x functionality
bit 14 CSP: Chip Select x Polarity bit
1 = Active-high (PMCSx)
0 =Active-low (PMCSx
)
bit 13 CSPTEN: PMCSx Port Enable bit
1 = PMCSx port is enabled
0 = PMCSx port is disabled
bit 12 BEP: Chip Select x Nibble/Byte Enable Polarity bit
1 = Nibble/Byte enable active-high (PMBE0, PMBE1)
0 = 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)
0 = Write strobe active-low (PMWR
)
For Master mode when SM = 1:
1 = Enable strobe active-high (PMENB)
0 = 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)
0 = Read strobe active-low (PMRD
)
For Master mode when SM = 1:
1 = Read/write strobe active-high (PMRD/PMWR)
0 = Read/Write strobe active-low (PMRD
/PMWR)
bit 8 SM: Chip Select x Strobe Mode bit
1 = Read/Write and enable strobes (PMRD/PMWR and PMENB)
0 = Read and write strobes (PMRD and PMWR)
bit 7 ACKP: Chip Select x Acknowledge Polarity bit
1 = ACK active-high (PMACK1)
0 = ACK active-low (PMACK1)
bit 6-5 PTSZ<1:0>: Chip Select x Port Size bits
11 = Reserved
10 = 16-bit port size (PMD<15:0>)
01 = 4-bit port size (PMD<3:0>)
00 = 8-bit port size (PMD<7:0>)
bit 4-0 Unimplemented: Read as ‘0’