Data Sheet

IDC7 Bluetooth Module
Model: IDC747
Page: 8 Copyright IOT747 Ref: IDC747-DTS-V003
IOT747, 122 Ross Street, Cambridge, CB1 3BU, United Kingdom
Check www.iot747.com for updates. Email: [e-mail] Back to TOC
IDC747 Module
Product Information Data Sheet
Ref: IDC747-DTS-V003
Latest Update: July 20, 2021
122 Ross Street, CB13BU
Cambridge, United Kingdom
www.iot747.com
Battery Voltage Supply Configuration
In a battery sourced application VBAT and VBAT_SENSE are connected to the battery
source, VDD_PADS is driven from a regulated supply external to the module, VCHG and
VCHG_SENSE are connected to the charging input source as per the figure below.
Pin #
Pin Name
Connection
Voltage Input Range
25
CHG_EXT
Not Connected
26
VCHG
Charger Source (VBUS)
4.75V* to 6.5V
27
VBAT_SENSE
Connect to Battery
3.0V** to 4.6V
28
VBAT
Connect to Battery
3.0V** to 4.6V
29
VDD_PADS
Connect to regulated 3.3V Supply
1.7V to 3.6V
30
VCHG_SENSE
Charger Source (VBUS)
NA
* Can operate at a reduced capacity down to 4.0V, VCHG minimum is 4.0V
** Devices operates down to 2.8V recommended software shut off is at 3.0V
Module Boot Modes
If the device is ‘No Power’ state (No voltage applied to the module), a connection (voltage
applied) to VBAT or VCHG will transition the module from unpowered to Active.
The device can also be in ‘Power Off’ State while there is voltage applied to VBAT. The
‘Power Off’ state is different to the No Power state because the IDC747 has voltage on
VBAT. In the ‘Power Off’ state the following events boot the chip and transition it to the
Active state: (1) a rising edge on SYS_CTRL held high for 20 ms or (2) a rising edge on
VCHG held high for 20 ms. NOTE that the device cannot be in ‘Power Off’ when voltage is
present on VCHG input. The device can transition from Active to ‘Power Off’ with a UART
command (See UART Manual) or a rising edge on SYS_CTRL.