Pin
Name
Description
Default Mode
Description
Mode 1
Level
1
GND
Ground
Ground
3.3 V
2
GND
Ground
Ground
3
KP_ROW0
Keypad row 0
Keypad row 0
4
KP_COL0
Keypad column 0
Keypad column 0
5
KP_ROW1
Keypad row 1
Keypad row 1
6
KP_COL1
Keypad column 1
Keypad column 1
7
KP_ROW2
Keypad row 2
Keypad row 2
8
KP_COL2
Keypad column 2
Keypad column 2
9
KP_ROW3
Keypad row 3
Keypad row 3
10
KP_COL3
Keypad column 3
Keypad column 3
11 *1
KP_ROW4
I²C2 SDA (without
internen pullups)
I²C2 SDA (without
internal pullups)
12 *1
KP_COL4
I²C2 SCL (without
internen pullups)
I²C2 SCL (without
internal pullups)
13
KP_ROW5_DMA
Keypad row 5
SPI Interrupt Request
14
KP_COL5_SS1
Keypad column 5
SPI Slave Select 1
15
KP_ROW6_MISO
Keypad row 6
SPI Master in Slave out
16
KP_COL6_MOSI
Keypad column 6
SPI Master out Slave in
17
KP_ROW7_SLK
Keypad row 7
SPI Serial Clock
18
KP_COL7_SS0
Keypad column 7
SPI Slave Select 0
19
Aux_Out
500 mA (can be controlled by software)
5.0 V
20
Header: JST SM20B-SRDS-G-TF, side entry, RM = 1.00
Plug: JST SHDR-20V-S-B, crimp contact: SSH-003GA-P0.2
*1 If Option HDMI is populated:
not usable as keypad row 4 and keypad column 4 (mode 2 / mode 3)
I²C2 is shared with I²C at HMDI
Pull-Ups of about 2kOhm to 3.3V existing on I²C signals.
3 1
2
1
PRODUCT MANUAL
SANTOKA core
6.24 Keypad/SPI (X21) *
Keypad/SPI/I²C, multiplexed
* alternative assembly upon request