Product Info

VTech proprietary and confidential
VTech Communications LTD.
R&D Department
The document is VTech’s proprietary information, Please do not disclose to third party without VTech’s consent
Ref. No.: 20191009 Version: 01 Date: 09 Oct, 2019 Page 7 of 33
4 Serial Quad I/O Flash
The VTBM-A01 BT Module uses external serial flash ICs for storage of:
• Device-specific data
• Application
• Libraries
• Voice prompt files
• Proprietary data
The VTBM-A01 BT Module supports a 8MB 4‑bit I/O flash.
Figure 4-1 Typical connection between the QCC3008 QFN and a serial flash IC
5 Serial interfaces
5.1 USB interface
VTBM-A01 BT Module has a full-speed (12 Mbps) USB interface for communicating with other compatible digital devices.
The USB interface on VTBM-A01 BT Module acts as a USB peripheral, responding to requests from a master host controller.
VTBM-A01 BT Module contains internal USB termination resistors and requires no external resistors.
VTBM-A01 BT Module supports the Universal Serial Bus Specification, Revision v2.0 (USB v2.0 Specification), supports
USB standard charger detection, and fully supports the USB Battery Charging Specification v1.2.
5.2 UART interface
VTBM-A01 BT Module has a UART serial interface that provides a simple mechanism for communicating
with other serial devices using the RS232 protocol, including for test and debug. The UART interface is
multiplexed with PIOs and other functions, and hardware flow control is optional.
Table 5-1 PS Keys for UART/PIO multiplexing
PS Key
PIO location option