Neoway N720 - Figure 2-30 32 Khz Clock Signal Timing; Table 2-6 Timing Parameters of 32 Khz Clock Signal

N720 Hardware User Guide
Copyright © Neoway Technology Co., Ltd 34
VDDXO_1P8
53
PO
1.8V power supply
output
Used to connect to the
crystalloid of external WLAN
module via a pull-up resistor
Leave this pin unconnected if it
is not used.
WLAN_3V_EN
63
DO
WLAN external
LDO enable control
Leave this pin unconnected if it
is not used.
WLAN_EN
62
DO
WLAN enable
Leave this pin unconnected if it
is not used.
WLAN_SLEEP_CLK
61
DO
WLAN sleep clock
signal
Leave this pin unconnected if it
is not used.
WAKE_ON_WIRELESS
60
DO
WLAN mode control
signal
Leave this pin unconnected if it
is not used.
LTE_COEX_RX_UART and LTE_COEX_TX_UART are co-exist control signal of LTE and Wi-Fi. They
are used for UART data receive and transmit.
VDDXO_1P8 is connected to the crystalloid of WLAN chipset through a pull-up resistor. The drive
current is lower than 20 mA and other functions are forbidden.
WLAN_EN is the enable signal to control Wi-Fi and it is connected to the ground through a pull-down
resistor. It works at high level.
WAKE_ON_WIRELESS is the communication signal for WLAN mode. This pin supports 1.8V and open
drain. Leave this pin unconnected if the WLAN chipset does not support the function.
WLAN_SLEEP_CLK is the clock output signal of WLAN in sleep mode. The clock frequency is 32.768
KHz. When WLAN enters sleep mode, this pin outputs a low-power 32.768 KHz clock signal to the
WLAN chipset. The following figure and table shows the clock signal timing and parameters respectively.
Figure 2-30 32KHz clock signal timing
Table 2-6 Timing parameters of 32KHz clock signal
Parameter
Signal
Min.
Typical
Max
Unit
Clock frequency
CK1
-
32.768
-
KHz