AS3911 datasheet(64/149 Pages) AMSCO

64 / 149 page

AS3911 – 64

ams Datasheet, Confidential: 2013-Oct [2-03]

A p pl i c at io n I n f o r m at i o n

IO Configuration Register 2

Figure 41:

IO Configuration Register 2

Note:

Default setting is set at power-up only.

Address 01h: IO Configuration Register 2

Type: RW

Bit

Name

Default

Function

Comments

7sup3 V

0: 5 V supply

1: 3.3 V supply

5 V supply, range: 4.1 V to 5.5

3.3 V supply, range: 2.4 V to

3.6 V

6vspd_off

1: Disable VSP_D regulator

Used for low cost

applications. When this bit is

set:

At 3 V or 5 V supply VSP_D

and VSP_A shall be shorted

externally

At 3.3 V applications VSP_D

can alternatively be supplied

from VDD in case VSP_A is not

more than 300 mV lower then

VDD

5Not used

4miso_pd2

1: Pull-down on MISO, when /SS is low

and MISO is not driven by the AS3911

3miso_pd1

1: Pull-down on MISO when /SS is high

2io_18

1: Increase MISO driving level in case

of 1.8 V VDD_IO

1Not used

0slow_up

1: Slow ramp at Tx on

≥ 10μs 10% to 90%, for B

AS3911 Datasheet(PDF) 64 Page - ams AG

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