Digital Io (Low Speed) Expansion Header J2601 - Intrinsyc Open-Q 2100 User Manual

Open-Q™ 2100 Development Kit based on the Snapdragon™ 2100 (APQ8009W) Processor User Guide Version 1.4

3.9.8 Digital IO (Low Speed) expansion header J2601

Pin 1.
Digital IO (low speed) expansion header J2601 is a 20-pin connector that provides access
to BLSP2/ BLSP1 signals. It is ideally used for connecting external peripherals such as
microcontrollers and any other devices that are based on I2C, SPI, UART and GPIO.
Please refer to the SOM carrier board schematic for the level shifter, target voltage and
current rating depending on stuffing option. The header supports 1.8V, 2.7V and 3.3V
power supplies. All signals are referenced to 1.8V rail. The following are the detailed pin out
information for digital IO (low speed) header J2601.
Table 3.9-7 Digital IO (low speed) Expansion Header J2601 Pin out
Description
GND
BLSP 2 (BIT2) /
GPIO 21
BLSP 2 (BIT0) /
GPIO 112
GPIO 87
GPIO 98
1.8V Power supply
GPIO
Multipurpose pin 4
from PMIC
GPIO 49
NC
Figure 15 J2601 Digital IO (low speed) expansion header
Signal Pin NO
GND J2601[1]
GPIO_21_BL J2601[3]
SP2_BIT2
GPIO_112_BL J2601[5]
SP2_BIT0
GPIO_87_US J2601[7]
ER_SW1
GPIO_98_BL J2601[9]
SP2_SPI_CS1
SBC_VREG_1 J2601[11]
P8
GPIO_86 J2601[13]
(stuffing
option)
PMIC_MPP_4 J2601[15]
GPIO_49_US J2601[17]
ER_LED1
N/C J2601[19]
Copyright Intrinsyc Technologies Corporation
Description
2.7V Supply
BLSP 2 (BIT3) /
GPIO 20
BLSP2 (BIT1) /
GPIO 97
GPIO 91
General purpose
pin 4 from PMIC
3.3V Power supply
GLSP1 (SPI_CS1)
Multipurpose pin 3
from PMIC
GPIO 69
GND
27
Signal
Number
VREG_L18_2P7 J2601[2]
GPIO_20_BLSP2 J2601[4]
_BIT3
GPIO_111_BLSP J2601[6]
2_BIT1
GPIO_91_USER J2601[8]
_SW2
PM_GPIO_4 J2601[10]
J2601[12]
SBC_VREG_3P3
J2601[14]
GPIO_97_BLSP1
_SPI_CS1
PMIC_MPP_3 J2601[16]
GPIO_69_USER J2601[18]
_LED2
GND J2601[20]
Pin