Jameco Electronics Rabbit 3000 User Manual
Page 144
User’s Manual
135
Table 9-8. Parallel Port D Register functions
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PDDR (R/W)
adr = 0x060
PD7
PD6
PD5
PD4
PD3
PD2
PD1
PD0
PDDCR (W)
adr = 0x066
out =
open
drain
out =
open
drain
out =
open
drain
out =
open
drain
out =
open
drain
out =
open
drain
out =
open
drain
out =
open
drain
PDFR (W)
adr = 0x065
x
alt TXA
x
alt TXB
x
x
x
x
PDDDR (W)
adr = 0x067
dir =
out
dir =
out
dir =
out
dir =
out
dir =
out
dir =
out
dir =
out
dir =
out
PDB0R (W)
adr = 0x068
x
x
x
x
x
x
x
PD0
PDB1R (W)
adr = 0x069
x
x
x
x
x
x
PD1
x
PDB2R (W)
adr =0x 06A
x
x
x
x
x
PD2
x
x
PDB3R (W)
adr = 0x06B
x
x
x
x
PD3
x
x
x
PDB4R (W)
adr = 0x06C
x
x
x
PD4
x
x
x
x
PDB5R (W)
adr = 0x06D
x
x
PD5
x
x
x
x
x
PDB6R (W)
adr = 0x06E
x
PD6
x
x
x
x
x
x
PDB7R (W)
adr = 0x06F
PD7
x
x
x
x
x
x
x
Table 9-9. Parallel Port D Control Register (adr = 0x064)
Bits 7, 6
Bits 5, 4
Bits 3, 2
Bits 1, 0
x,x
00—clock upper nibble on pclk/2
01—clock on timer A1
10—clock on timer B1
11—clock on timer B2
x,x
00—clock lower nibble on pclk/2
01—clock on timer A1
10—clock on timer B1
11—clock on timer B2