TC35680FSG datasheet(38/91 Pages) TOSHIBA

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TC35680FSG-002/TC35681FSG-002

2019-04-04

GPIO Pin Setting

The following settings of each GPIO pin can be done by software. And they are also held after this device enters a low power mode.

The setting method of the GPIO function is shown in Table 4-3.



Some GPIO pins have multiplexed functions. For details, refer to Section 2.4. The general-purpose I/O (GPIO)

function can be assigned by setting the function 0.



The input or output function can be assigned to a GPIO pin.



The input of each GPIO can be enabled or disabled. When another multiplexed function is used and it is an input

function, the input standby of the pin should be released because the input standby function fixes the internal input

signal to Low level.



The connection or disconnection of a built-in pull-up resistor can be selected. And the connection or disconnection of

a built-in pull-down resistor can be also selected. The initial value of each pin is shown in Table 2-3. The pull-up

resistor and the pull-down resistor should not be simultaneously connected to the same pin.



The pull-up resistor and the pull-down resistor are disconnected regardless of the settings when the pin is set to an

output one. When the output is disabled, the last settings are restored.



The drive current can be selected from these options: 1 mA, 1.5 mA, 2 mA, and 4 mA.



An external interrupt request can be accepted when the GDIO pin is set to an input one. The detection of the interrupt

request can be selected from an edge detection (a rising edge, a falling edge, or both edges) and a level detection

(High level or Low level) per pin. And no detection can be also selected.

Table 4-3 Setting method of GPIO

Setting

Setting method

HCI command

API

Input or Output setting

HCI_M2_BTL_READ_MEMORY

reads the data and

HCI_M2_BTL_WRITE_MEMORY

sets the data.

SYS_API_SetGpioEn

GPIO_OUT_EN (output setting)

GPIO_OUT_EN_WRAP

(output

setting)

Input standby

—

PMU_IOSTANDBYX

Pull-up resistor and Pull-down

resistor settings

SYS_API_SetGpioCfgReg

GPIO_CFG

Drive current setting

SYS_API_SetGpioCfgReg

GPIO_CFG

Interrupt setting

SYS_API_SetGpioCfgReg

GPIO_CFG

Input data read

—

GPIO_MON and GPIO_MON_WRAP

Output data setting

—

GPIO_OUT and GPIO_OUT_WRAP

General-purpose Input Function

The general-purpose input of a GPIO pin is enabled when the function 0 in Table 2-2 is assigned to the pin and the input standby is

released according to the setting in Table 4-3. When the input standby is set, the general-purpose input is disabled. The internal input

data is fixed to Low level. The input standby setting is held after this device enters a low power mode.

When a GPIO pin is used as a CMOS input, the fixed level of the external input signal should be High level or Low level. If the input

standby is set to the pin, the pin does not work as the CMOS input. When the pin is open or when the pin is used for the ADC function,

the input standby of the pin should be set.

When both the input standby and the output disable are set, the input and output of the GPIO pin are disabled (“Disable” state).

When, additionally, the built-in pull-up and pull-down resistors are disconnected, the pin becomes Hi-Z.

The connection or disconnection of the built-in pull-up and pull-down resistors is set by the API or the corresponding register in Table

4-3.

The input data can be read using “Input data read” method described in Table 4-3.

TC35680FSG Datasheet(PDF) 38 Page - Toshiba Semiconductor

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