BCM20707 Datasheet, PDF (14/65 Pages) Cypress Semiconductor – Complies with Bluetooth Core Specification version 4.2 including BR/EDR/BLE

BCM20707 Preliminary Data Sheet
Microprocessor Unit
External Reset
An external active-low reset signal, RESET_N, can be used to put the BCM20707 in the reset state. An external
voltage detector reset IC with 50 ms delay is needed on the RESET_N. The RESET_N should be released only
after the VDDO supply voltage level has been stabilized for 50 ms.
Figure 2: Reset Timing
Low
threshold
Reset
(External)
VDDO
50 ms
~2.4 ms
VDDO POR
VDDC
VDDC Reset (Internal)
XTAL_RESET
XTAL_BUF_PU
0.5 ms
~2.4 ms
10 LPO cycles
8 LPO cycles
Note: The Reset signal should remain below this threshold 50 ms after VDDO is stable. Note that the
representation of this signaling diagram is extended and not drawn to scale.
Broadcom^®
May 27, 2016 • 20707-DS206-R
BROADCOM CONFIDENTIAL
Bluetooth SoC
Page 13