SimCom SIM8905A, Руководство пользователя

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Smart Machine Smart Decision
14
I
TRKL-A
Trickle-A Charging current
81 90 99 mA
I
TRKL-B
Trickle-B Charging current
405 450 495 mA
V
TRKL
Trickle-B threshold voltage range
Programmable, 15.62 mV steps
2.5 2.796 2.984 V
V
WEAK
Weak battery threshold range
Programmable, 18.75 mV steps
3.0 3.206 3.581 V
V
BAT_MAX
Maximum battery voltage
Programmable, 25 mV steps
4 4.2 4.775 V
I
BAT_MAX
Fast charging current range
Programmable, 90mA steps
90 1440 mA
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 Pin#
Expected or Default
Function
Alternative
Function 1
Alternative
Function 2
UART2_TXD 94
BLSP1_UART_TX BLSP1_SPI_MOSI
UART2_RXD 93
BLSP1_UART_RX BLSP1_SPI_MISO
SENSOR_I2C_SDA 92 BLSP1_I2C_SDA
BLSP1_SPI_CS_N BLSP1_UART_CTS
SENSOR_I2C_SCL 91 BLSP1_I2C_SCL
BLSP1_SPI_CLK BLSP1_UART_RTS
GPIO_8 119
GPIO BLSP6_SPI_MOSI
GPIO_9 118
GPIO BLSP6_SPI_MISO
GPIO_10 117
GPIO BLSP6_SPI_CS_N
BLSP6_I2C_SDA
GPIO_11 116
GPIO BLSP6_SPI_CLK
BLSP6_I2C_SCL
GPIO_16 123
GPIO BLSP5_SPI_MOSI
GPIO_17 124
GPIO BLSP5_SPI_MISO
TP_I2C_SDA 48 BLSP5_I2C_SDA
BLSP5_SPI_CS_N
TP_I2C_SCL 47 BLSP5_I2C_SCL
BLSP5_SPI_CLK
UART1_TXD 34 BLSP2_UART_TX
BLSP2_SPI_MOSI
UART1_RXD 35 BLSP2_UART_RX
BLSP2_SPI_MISO
UART1_CTS 36 BLSP2_UART_CTS
BLSP2_SPI_CS_N
BLSP2_I2C_SDA
UART1_RTS 37
BLSP2_UART_RTS BLSP2_SPI_CLK
BLSP2_I2C_SCL
CAM_I2C_SDA 84
BLSP3_I2C_SDA
CAM_I2C_SCL 83
BLSP3_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;