PM8313 datasheet(77/192 Pages) PMC

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PM8313 датащи(PDF) 77 Page - PMC-Sierra, Inc

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PM8313 D3MX

DATA SHEET

PMC-920702

ISSUE 5

M13 MULTIPLEXER

data bus driver pads. When IOTST and PMCTST are both logic 0, the

DBCTRL bit is ignored.

IOTST:

The IOTST bit is used to allow normal microprocessor access to the test

registers and control the test mode in each TSB block in the D3MX for board

level testing. When IOTST is a logic 1, all blocks are held in test mode and

the microprocessor may write to a block's test mode 0 registers to manipulate

the outputs of the block and consequently the device outputs (refer to the

"Test Mode 0 Details" in the "Test Features" section).

HIZIO, HIZDATA:

The HIZIO and HIZDATA bits control the tri-state modes of the D3MX . While

the HIZIO bit is a logic 1, all output pins of the D3MX except the data bus are

held in a high-impedance state. The microprocessor interface is still active.

While the HIZDATA bit is a logic 1, the data bus is also held in a high-

impedance state which inhibits microprocessor read cycles.

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