DS2408 Просмотр технического описания (PDF) - Maxim Integrated

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DS2408

1-Wire 8-Channel Addressable Switch

Maxim Integrated 

DS2408

Conditional Search Channel Selection Mask Register

The data in this register controls whether a PIO channel qualifies for participation in the conditional

search command. To include one or more of the PIO channels, the bits in this register that correspond to

those channels need to be set to 1. This register can only be written through the Write Conditional Search

Registers command.

Conditional Search Channel Selection Mask Register Bitmap

ADDR b7

b6

b5

b4

b3

b2

b1

b0

008Bh SM7 SM6 SM5 SM4 SM3 SM2 SM1 SM0

This register is read/write. Each bit is associated with the respective PIO channel as shown in Figure 7.

This register is cleared to 00h by a power-on reset

Conditional Search Channel Polarity Selection Register

The data in this register specifies the polarity of each selected PIO channel for the device to respond to

the conditional search command. Within a PIO channel, the data source may be either the channel's input

signal (pin) or the channel's activity latch, as specified by the PLS bit in the Control/Status register at ad-

dress 008Dh. This register can only be written through the Write Conditional Search Registers command.

Conditional Search Channel Polarity Selection Register Bitmap

ADDR b7

b6

b5

b4

b3

b2

b1

b0

008Ch SP7 SP6 SP5 SP4 SP3 SP2 SP1 SP0

This register is read/write. Each bit is associated with the respective PIO channel as shown in Figure 7.

This register is cleared to 00h by a power-on reset.

Figure 7. Conditional Search Logic

PLS CHANNEL 0 SP0

SM0

CT

AL0

P0

CHANNEL 7

INPUT FROM

CHANNELS 1 TO 6

(NOT SHOWN)

SP7

SM7

CSR

AL7

P7

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