Jameco-electronics Rabbit 3000 Manuel d'utilisateur télécharger pdf (Page 118)

User’s Manual 109

Table 7-22. Input Capture Source x Register

Input Capture Source x Register (ICS1R) (Address = 0x59)

(ICS2R) (Address = 0x5D)

Bit(s) Value Description

7:6 00 Parallel Port C used for Start condition input.

01 Parallel Port D used for Start condition input.

10 Parallel Port F used for Start condition input.

11 Parallel Port G used for Start condition input.

5:4 00 Use port bit 1 for Start condition input.

01 Use port bit 3 for Start condition input.

10 Use port bit 5 for Start condition input.

11 Use port bit 7 for Start condition input.

3:2 00 Parallel Port C used for Stop condition input.

01 Parallel Port D used for Stop condition input.

10 Parallel Port F used for Stop condition input.

11 Parallel Port G used for Stop condition input.

1:0 00 Use port bit 1 for Stop condition input.

01 Use port bit 3 for Stop condition input.

10 Use port bit 5 for Stop condition input.

11 Use port bit 7 for Stop condition input.

Table 7-23. Input Capture LSB x Register

Input Capture LSB x Register (ICL1R) (Address = 0x5A)

(ICL2R) (Address = 0x5E)

Bit(s) Value Description

7:0 read

The least significant eight bits of the latched Input Capture count are returned.

Reading the lsb of the count latches the msb of the count to avoid reading stale

data. Reading the msb of the count opens the latches.

Table 7-24. Input Capture MSB x Register

Input Capture MSB x Register (ICM1R) (Address = 0x5B)

(ICM2R) (Address = 0x5F)

Bit(s) Value Description

7:0 read The most significant eight bits of the latched Input capture count are returned.

1 2 ... 113 114 115 116 117 118 119 120 121 122 123 ... 348 349

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Jameco-electronics Rabbit 3000 Manuel d'utilisateur Page 118