Gpio_98; Gpio_0; Gpio_89; Uart2_Txd - SimCom SIM8905A User Manual

I
TRKL-A
I
TRKL-B
V
TRKL
V
WEAK
V
BAT_MAX
I
BAT_MAX
VBAT_SNS
VBAT_SNS is used for battery voltage sensing, the typical input range is 2.5V~4.5V.
UART/SPI/I2C
SIM8905A provides several sets of GPIOs which are available as BLSP (BAM-enabled low-speed peripheral)
interfaces that can be configured to support various interface combinations, as shown in the following table. The
operation voltage is 1.8V
Table 4: UART/SPI/I2C functional assignments
Pin Name

UART2_TXD

UART2_RXD

SENSOR_I2C_SDA

SENSOR_I2C_SCL

GPIO_8
GPIO_9
GPIO_10
GPIO_11
GPIO_16
GPIO_17
TP_I2C_SDA
TP_I2C_SCL
UART1_TXD
UART1_RXD
UART1_CTS
UART1_RTS

CAM_I2C_SDA

CAM_I2C_SCL

Note:
1. UART: can be used as a diagnostic port, up to 4 Mbps;
2. I2C: supports master-only mode; up to 3.4 MHz, 2.2Kohm pull-up resistors are needed externally;
Trickle-A Charging current
Trickle-B Charging current
Trickle-B threshold voltage range
Programmable, 15.62 mV steps
Weak battery threshold range
Programmable, 18.75 mV steps
Maximum battery voltage
Programmable, 25 mV steps
Fast charging current range
Programmable, 90mA steps
Expected or Default
Pin#
Function
94
BLSP1_UART_TX
93
BLSP1_UART_RX
92 BLSP1_I2C_SDA
91 BLSP1_I2C_SCL
119
GPIO
118
GPIO
117
GPIO
116
GPIO
123
GPIO
124
GPIO
48 BLSP5_I2C_SDA
47 BLSP5_I2C_SCL
34 BLSP2_UART_TX
35 BLSP2_UART_RX
36 BLSP2_UART_CTS
37
BLSP2_UART_RTS
84
BLSP3_I2C_SDA
83
BLSP3_I2C_SCL
Smart Machine Smart Decision
81
405
2.5
3.0
4
90
Alternative
Function 1
BLSP1_SPI_MOSI
BLSP1_SPI_MISO
BLSP1_SPI_CS_N
BLSP1_SPI_CLK
BLSP6_SPI_MOSI
BLSP6_SPI_MISO
BLSP6_SPI_CS_N
BLSP6_SPI_CLK
BLSP5_SPI_MOSI
BLSP5_SPI_MISO
BLSP5_SPI_CS_N
BLSP5_SPI_CLK
BLSP2_SPI_MOSI
BLSP2_SPI_MISO
BLSP2_SPI_CS_N
BLSP2_SPI_CLK
14
90 99 mA
450 495 mA
2.796 2.984
3.206 3.581
4.2 4.775
1440 mA
Alternative
Function 2
BLSP1_UART_CTS
BLSP1_UART_RTS
BLSP6_I2C_SDA
BLSP6_I2C_SCL
BLSP2_I2C_SDA
BLSP2_I2C_SCL
V
V
V