Datasheet

© 2009 Microchip Technology Inc. DS39775C-page 171
PIC18F87J50 FAMILY
REGISTER 11-4: PMMODEL: PARALLEL PORT MODE REGISTER LOW BYTE
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
WAITB1
(1)
WAITB0
(1)
WAITM3 WAITM2 WAITM1 WAITM0 WAITE1
(1)
WAITE0
(1)
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 7-6 WAITB1:WAITB0: Data Setup to Read/Write Wait State Configuration bits
(1)
11 = Data wait of 4 TCY; multiplexed address phase of 4 TCY
10 = Data wait of 3 TCY; multiplexed address phase of 3 TCY
01 = Data wait of 2 TCY; multiplexed address phase of 2 TCY
00 = Data wait of 1 TCY; multiplexed address phase of 1 TCY
bit 5-2 WAITM3:WAITM0: Read to Byte Enable Strobe Wait State Configuration bits
1111 = Wait of additional 15 TCY
...
0001 = Wait of additional 1 T
CY
0000 = No additional wait cycles (operation forced into one TCY)
bit 1-0 WAITE1:WAITE0: Data Hold After Strobe Wait State Configuration bits
(1)
11 = Wait of 4 TCY
10 = Wait of 3 TCY
01 = Wait of 2 TCY
00 = Wait of 1 TCY
Note 1: WAITB and WAITE bits are ignored whenever WAITM3:WAITM0 = 0000.
REGISTER 11-5: PMEH: PARALLEL PORT ENABLE REGISTER HIGH BYTE
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
PTEN15 PTEN14 PTEN13 PTEN12 PTEN11 PTEN10 PTEN9 PTEN8
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 7-6 PTEN15:PTEN14: PMCSx Strobe Enable bits
1 = PMA15 and PMA14 function as either PMA<15:14> or PMCS2 and PMCS1
0 = PMA15 and PMA14 function as port I/O
bit 5-0 PTEN13:PTEN8: PMP Address Port Enable bits
1 = PMA<13:8> function as PMP address lines
0 = PMA<13:8> function as port I/O