Rabbit RabbitCore RCM3209 User Manual page 148

Register Name
Port F Data Register
Bits
0:7
Port F Control Register
Bits
0:1
2:3
4:5
6:7
Port F Function Register
Bits
0:7
0
1
2:3
4
5
6
7
Port F Drive Control Register
Bits
0:7
142
Table E-2. Parallel Port F Registers
Mnemonic
PFDR 00111000 (0x38)
Value
Read Current state of pins
Port buffer. Value transferred to O/P register on next
Write
rising edge of transfer clock.
PFCR 00111100 (0x3C)
Value
00 Lower nibble transfer clock is CLK/2
01 Lower nibble transfer clock is Timer A1
10 Lower nibble transfer clock is Timer B1
11 Lower nibble transfer clock is Timer B2
xx These bits are ignored
00 Upper nibble transfer clock is CLK/2
01 Upper nibble transfer clock is Timer A1
10 Upper nibble transfer clock is Timer B1
11 Upper nibble transfer clock is Timer B2
xx These bits are ignored
PFFR 00111101 (0x3D)
Value
0 Corresponding port bits function normally
1 Bit 0 carries SCLK_D
1 Bit 1 carries SCLK_C
x No effect
1 Bit 4 carries PWM[0] output
1 Bit 5 carries PWM[1] output
1 Bit 6 carries PWM[2] output
1 Bit 7 carries PWM[3] output
PFDCR 00111110 (0x3E)
Value
0 Corresponding port bit is active high or low
1 Corresponding port bit is open drain
I/O Address R/W
R/W
Description
W only
Description
W
Description
W
Description
RabbitCore RCM3209/RCM3229
Reset Value
xxxxxxxx
xx00xx00
xxxxxxxx
xxxxxxxx