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 9 of 33
Parity
None, Odd or Even
Number of stop bits
1 or 2
Bits per byte
8
Table 5-3 lists common baud rates and their associated error values for PSKEY_UART_BITRATE. To
set the UART baud rate, load PSKEY_UART_BITRATE with the number of bits per second.
Table 5-3 Standard baud rates
Baud rate
PS Key value (bits per second)
Error
1200
1200
1.73%
2400
2400
1.73%
4800
4800
1.73%
9600
9600
-0.82%
19200
19200
0.45%
38400
38400
-0.18%
57600
57600
0.03%
76800
76800
0.14%
115200
115200
0.03%
230400
230400
0.03%
460800
460800
-0.02%
921600
921600
0.00%
1382400
1382400
-0.01%
1843200
1843200
0.00%
2764800
2764800
0.00%
3686400
3686400
0.00%
5.3 SPI interface
VTBM-A01 BT Module provides a debug SPI interface for programming, configuring, and debugging the VTBM-A01
BT Module.
Access to this interface is required in production. Ensure the 4 SPI signals are brought out to either test points or a
header. Use the SPI interface. QTIL provides development and production tools to communicate over the SPI from a
PC, although a level translator circuit is often required. All are available from QTIL.
5.4 I²C interface