Datasheet

 2010 Microchip Technology Inc. DS39969B-page 281
PIC24FJ256DA210 FAMILY
REGISTER 19-7: PMCSxMD: CHIP SELECT x MODE REGISTER
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 U-0 U-0 U-0
ACKM1 ACKM0 AMWAIT2 AMWAIT1 AMWAIT0 — — —
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
DWAITB1 DWAITB0 DWAITM3 DWAITM2 DWAITM1 DWAITM0 DWAITE1 DWAITE0
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 15-14 ACKM<1:0>: Chip Select x Acknowledge Mode bits
11 = Reserved
10 = PMACKx is used to determine when a read/write operation is complete
01 = PMACKx is used to determine when a read/write operation is complete with time-out
If DWAITM<3:0> = 0000, the maximum time-out is 255 T
CY, else it is DWAITM<3:0> cycles.
00 = PMACKx is not used
bit 13-11 AMWAIT<2:0>: Chip Select x Alternate Master Wait States bits
111 = Wait of 10 alternate master cycles
. . .
001 = Wait of 4 alternate master cycles
000 = Wait of 3 alternate master cycles
bit 10-8 Unimplemented: Read as ‘0’
bit 7-6 DWAITB<1:0>: Chip Select x Data Setup Before Read/Write Strobe Wait States bits
11 = Wait of 3¼ TCY
10 = Wait of 2¼ TCY
01 = Wait of 1¼ TCY
00 = Wait of ¼ TCY
bit 5-2 DWAITM<3:0>: Chip Select x Data Read/Write Strobe Wait States bits
For Write operations:
1111 = Wait of 15½ TCY
. . .
0001 = Wait of 1½ TCY
0000 = Wait of ½ TCY
For Read operations:
1111 = Wait of 15¾ TCY
. . .
0001 = Wait of 1¾ TCY
0000 = Wait of ¾ TCY
bit 1-0 DWAITE<1:0>: Chip Select x Data Hold After Read/Write Strobe Wait States bits
For Write operations:
11 = Wait of 3¼ TCY
10 = Wait of 2¼ TCY
01 = Wait of 1¼ TCY
00 = Wait of ¼ TCY
For Read operations:
11 = Wait of 3 TCY
10 = Wait of 2 TCY
01 = Wait of 1 TCY
00 = Wait of 0 TCY