Rabbit RCM3200 Manuel d'utilisateur télécharger pdf (Page 126)

120 RabbitCore RCM3200

Table E-2. Parallel Port F Registers

Port F Data Register PFDR 00111000 (0x38) R/W xxxxxxxx

Bits Value Description

0:7 Read Current state of pins

Write

Port buffer. Value transferred to O/P register on next

rising edge of transfer clock.

Port F Control Register PFCR 00111100 (0x3C) W only xx00xx00

Bits Value Description

0:1 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

2:3 xx These bits are ignored

4:5 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

6:7 xx These bits are ignored

Port F Function Register PFFR 00111101 (0x3D) W xxxxxxxx

Bits Value Description

0:7 0 Corresponding port bits function normally

0 1 Bit 0 carries SCLK_D

1 1 Bit 1 carries SCLK_C

2:3 x No effect

4 1 Bit 4 carries PWM[0] output

5 1 Bit 5 carries PWM[1] output

6 1 Bit 6 carries PWM[2] output

7 1 Bit 7 carries PWM[3] output

Port F Drive Control Register PFDCR 00111110 (0x3E) W xxxxxxxx

Bits Value Description

0:7 0 Corresponding port bit is active high or low

1 Corresponding port bit is open drain

1 2 ... 121 122 123 124 125 126 127 128 129 130 131 ... 137 138

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Rabbit RCM3200 Manuel d'utilisateur Page 126