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 24 of 33
Table 7-10 I²S master mode timing parameters, WS and SCK as outputs (cont.)
Symbol
Parameter
Min
Typ
Max
Unit
tisu
SD_IN valid to SCK
high set up time
18.44
–
–
ns
tih
SCK high to SD_IN
invalid hold time
0
–
–
ns
Figure 7-11 Digital audio interface master timing
8 Power control
8.1 Switch-mode regulators
For greater power efficiency, the VTBM-A01 BT Module contains 2 switch-mode regulators:
• One to generate a 1.8 V supply rail with an output current of 185 mA.
• One to generate a 1.35 V supply rail with an output current of 160 mA.
• Combining the 2 switch-mode regulators in parallel generates a single 1.8 V supply rail with an output current of 340 mA.
8.2 Reset, RST#
VTBM-A01 BT Module is reset from several sources:
• RST# pin
• Power-on reset
• USB charger attach reset
• Software configured watchdog timer