obniz Docs Reference obniz Board PinOut

PinOut

Electrical Specification

obniz IO

Physical IO

Drive Method

Internal Weak Pull Up/Down

io0

io0

Input 3.3v(5v tolerant)(default)
Output push-pull5v(1A mode)
Output push-pull3v
Output open-drain

float(default)
pull-up to 5v
pull-up to 3v
pull-down to 0v

io1

io1

Input 3.3v(5v tolerant)(default)
Output push-pull5v(1A mode)
Output push-pull3v
Output open-drain

float(default)
pull-up to 5v
pull-up to 3v
pull-down to 0v

io2

io2

Input 3.3v(5v tolerant)(default)
Output push-pull5v(1A mode)
Output push-pull3v
Output open-drain

float(default)
pull-up to 5v
pull-up to 3v
pull-down to 0v

io3

io3

Input 3.3v(5v tolerant)(default)
Output push-pull5v(1A mode)
Output push-pull3v
Output open-drain

float(default)
pull-up to 5v
pull-up to 3v
pull-down to 0v

io4

io4

Input 3.3v(5v tolerant)(default)
Output push-pull5v(1A mode)
Output push-pull3v
Output open-drain

float(default)
pull-up to 5v
pull-up to 3v
pull-down to 0v

io5

io5

Input 3.3v(5v tolerant)(default)
Output push-pull5v(1A mode)
Output push-pull3v
Output open-drain

float(default)
pull-up to 5v
pull-up to 3v
pull-down to 0v

io6

io6

Input 3.3v(5v tolerant)(default)
Output push-pull5v(1A mode)
Output push-pull3v
Output open-drain

float(default)
pull-up to 5v
pull-up to 3v
pull-down to 0v

io7

io7

Input 3.3v(5v tolerant)(default)
Output push-pull5v(1A mode)
Output push-pull3v
Output open-drain

float(default)
pull-up to 5v
pull-up to 3v
pull-down to 0v

io8

io8

Input 3.3v(5v tolerant)(default)
Output push-pull5v(1A mode)
Output push-pull3v
Output open-drain

float(default)
pull-up to 5v
pull-up to 3v
pull-down to 0v

io9

io9

Input 3.3v(5v tolerant)(default)
Output push-pull5v(1A mode)
Output push-pull3v
Output open-drain

float(default)
pull-up to 5v
pull-up to 3v
pull-down to 0v

io10

io10

Input 3.3v(5v tolerant)(default)
Output push-pull5v(1A mode)
Output push-pull3v
Output open-drain

float(default)
pull-up to 5v
pull-up to 3v
pull-down to 0v

io11

io11

Input 3.3v(5v tolerant)(default)
Output push-pull5v(1A mode)
Output push-pull3v
Output open-drain

float(default)
pull-up to 5v
pull-up to 3v
pull-down to 0v

Peripherals

PINOUT

Peripheral

function

io0

io1

io2

io3

io4

io5

io6

io7

io8

io9

io10

io11

IO

output

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

input

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

AD

AD

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

PWM

IO

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

UART

TX

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

RX

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

CTS

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

RTS

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

SPI

CLK

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

MOSI

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

MISO

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

I2C

SDA

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

SCL

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

LogicAnalyzer

IO

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

Measure

PULSE

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

ECHO

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

Peripherals: IO

output

Each IO can put out digital values.

Drive methods can be selected from the three below.

Type

Voltage

max A

max Freq

Details

push-pull

5v (vcc)

<=1A

<=250khz(recommend)

Default. Overcurrent protection

push-pull

3v

<=1mA(recommend)

<=80Mhz

over current detection when using io.output().

open-drain

<=vcc

<=1mA(recommend)

<=80Mhz

Each method can be configured independently for each IO.
Not only for io.output(), but also for UART and SPI you can choose your preferred drive method.

input

There is only one input method.

3v input with 5v tolerant, so the threshold value is CMOS level.

Type

Level

max Freq

Detail

digital-in

3v(5v tolerant)

<=80Mhz

internal weak pull-up/pull-dow

Pull up and down can be configured independently for each IO.

There are four types as below.

Type

Pull to

Detail

floating

 

Default

pull-up

5v(vcc)

pull-up

3v

pull-down

gnd

12ch same time.

All 12ch ad can be used. It will not affect the sampling rate.

30 samples/sec or slower

Maximum sampling rate depends on your network speed and on obniz Board firmware version.(with ver1.0.0, max is 30samples/sec)

10bit - VDD calibrated

ad also monitors vdd of obniz Board itself(normally 5v). Each ad result will be calibrated. And ad accuracy is 10bit.

Calibration method is depend on firmware version.

Firmware version

calibration method

under 1.2

Always

1.2 or higher

Only Vdd is under 4.5v

ad can be started even io is used for io-output/uart/spi etc

ad converter is independent. It also works while IO is used for another function.

PWM

6(pwm0 to pwm5) are available.

UART

2 (uart0 to uart1) are available.

Available Configration

  1. baud: number (default 115200)
  2. stop: stop bit length 1(default)/1.5/2
  3. bits: data bits 8(default)/5/6/7
  4. parity: parity check "off"(default)/"odd"/"even"
  5. flowcontrol: flow control "off"(default)/"rts"/"cts"/"rts-cts"
  6. rts: io for rts (optional)
  7. cts: io for cts (optional)

SPI

2 (spi0 to spi1) are available.

Only Master mode.

I2C

1 (i2c0) is available.

Max speed is 1Mhz.
Master/Slave mode.
But slave mode only works with "written" events. You can't set data to be read.

LogicAnalyzer

1 (logicanalyzer) is available.

Measure

1 (measure) is available.

Embeded

Display

128x64 mono pixel OLED display.

Switch

4 State Digital Switch

BLE

BLE32 embeded Bluetooth Module