Data Sheet

W M B T 0 1 ( - s , - s c ) D a t a s h e e t
11
/
36
UART_TX
UART0_TX
GPIO0
TX_EN
UART0_TX(output)
UART_RX
UART0_RX
GPIO1
RX_EN
UART0_RX（input）
UART_RTS
UART0_RTS
GPIO2
PWM1
N/A
UART_CTS
UART0_CTS
GPIO3
PWM2
N/A
BOOT
BOOT Mode
N/A
N/A
N/A
GPIO7
GPIO7
CLK_EXT_32K_IN(ext
clock source)
PWM1
N/A
GPIO4
SWD_CLK
GPIO4
PWM3
I2C_SCLK
GPIO5
SWD_DIO
GPIO5
PWM4
I2C_SDA
GPIO15
GPIO15
UART1_TX
SPIM_CLK
SPIS_CLK
CONN/DISC
GPIO16
UART1_RX
SPIM_CSN
SPIS_CSN
I2C_SCL
GPIO17
I2C_SCLK
SPIM_MISO
SPIS_MISO
I2C_SDA
GPIO18
I2C_SDA
SPIM_MOSI
SPIS_MOSI
GPIO19
GPIO19
(BB)PCM_CLK
I2S_CLK
UART1_TX
GPIO20
GPIO20
(BB)PCM_SYNC
I2S_FS
UART1_RX
GPIO21
GPIO21
(BB)PCM_IN
I2S_IN
TX_EN
GPIO22
GPIO22
(BB)PCM_OUT
I2S_OUT
RX_EN
Note: need to customize the program to modify the pin assignment
4. Electrical Characteristic
4.1. Recommended Operating Conditions
Table 4 Recommended Operating Conditions
Rating
Min
Typical
Max
Unit
Storage temp.
-55
-
125
℃
Operating temp.
-40
-
85
℃
VDD power supply
1.9
3.3
3.6
V
4.2. Digital IO DC Characteristics
Table 5 Digital IO DC Characteristics (VDD=3.3V)
Symbol
Parameter
Min
Typical
Max
Unit
VIL
Low-level input voltage
-
0
0.9
V
VIH
High-level input voltage
2.0
3.3
-
V
VOL
Low-level output voltage
0
-
0.33
V
VOH
High-level output voltage
2.97
-
3.3
V
IOL
Low-level output current
-
8
-
mA
IOH
High-level output current
-
8
-
mA
Rpull
internal Pull up resistance
30K
50K
70K
Ω