Jameco-electronics Rabbit 3000 Manual do Utilizador descarregar pdf (Página 116)

User’s Manual 107

Table 7-19. Input Capture Control/Status Register

Input Capture Control/Status Register (ICCSR) (Address = 0x56)

Bit(s) Value Description

7:2

(read)

These status bits (but not the interrupt enable bits) are cleared by the read of this

7 0 The Input Capture 2 Start condition has not occurred.

(read) 1 The Input Capture 2 Start condition has occurred.

7 0 The corresponding Input Capture 2 Start interrupt is disabled.

(write) 1 The corresponding Input Capture 2 Start interrupt is enabled.

6 0 The Input Capture 2 Stop condition has not occurred.

(read) 1 The Input Capture 2 Stop condition has occurred.

6 0 The corresponding Input Capture 2 Stop interrupt is disabled.

(write) 1 The corresponding Input Capture 2 Stop interrupt is enabled.

5 0 The Input Capture 1 Start condition has not occurred.

(read) 1 The Input Capture 1 Start condition has occurred.

5 0 The corresponding Input Capture 1 Start interrupt is disabled.

(write) 1 The corresponding Input Capture 1 Start interrupt is enabled.

4 0 The Input Capture 1 Stop condition has not occurred.

(read) 1 The Input Capture 1 Stop condition has occurred.

4 0 The corresponding Input Capture 1 Stop interrupt is disabled.

(write) 1 The corresponding Input Capture 1 Stop interrupt is enabled.

3 0 The Input Capture 2 counter has not rolled over to all zeros.

(read) 1 The Input Capture 2 counter has rolled over to all zeros.

3 0 No effect on Input Capture 2 counter. This bit always reads as zero.

(write) 1 Reset Input Capture 2 counter to all zeros and clears the rollover latch.

2 0 The Input Capture 1 counter has not rolled over to all zeros.

(read) 1 The Input Capture 1 counter has rolled over to all zeros.

2 0 No effect on Input Capture 1 counter. This bit always reads as zero.

(write) 1 Reset Input Capture 1 counter to all zeros and clears the rollover latch.

1:0 0x Normal Input Capture operation.

x0 Normal Input Capture operation.

Reserved for test. The Input Capture counter increments at both bit 0 and bit 8.

There is no carry from lower byte to higher byte.

1 2 ... 111 112 113 114 115 116 117 118 119 120 121 ... 348 349

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Jameco-electronics Rabbit 3000 Manual do Utilizador Página 116