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[v1-10] 2018-Apr-25

AS39513 − Detailed Description

GPIO

When the SPI is not used (CE open or low), the DIN and DOUT

pins can be used as general purpose IOs (unless the SPI direct

command “Set IO Mode” has locked the device in SPI mode).

The functions of the DIN can be programmed as follows

according to the System parameter DIMD[1:0] stored in the

“Logging Control Parameters” address 0x439 (bits 1- 0) in the

EEPROM:

Figure 28:

DIN Functional Options (GPIO)

Bit 1

Bit 0

I/O

Structure

Function

Input

Pull-down

CMOS input, non-inverting 100k ohm pull down to ground

enabled.

Input

Pull-up

Pull-up current is supplied to DIN only during a logging event.

Input

Pull-up

When in the WAIT state, a pull-up current is supplied to DIN. A

falling edge on DIN manually causes a transition from WAIT

mode to ACTIVE mode. If TMSRT is also 1, the event that happens

first (delay or DIN input) causes the transition from WAIT mode

to ACTIVE mode.

Input

Pull-up

During ACTIVE mode, a pull-up current is supplied to DIN. A

falling edge on DIN generates a logging event.

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