Integration Guide
Table Of Contents
- 1 Introduction
- 2 Module Power
- 3 Interfaces
- 4 Hardware Design Guidelines
- Advanced Tips for an RF-Friendly Layout
- Audio Reference Design
- Control Connector Signal Descriptions and Functions
- Module Power (PINS 87, 89, 91, 93, 95, 97, 99)
- Modem Power-on and Recovery Techniques
- Power Switch Logic Detect (Pin 85)
- ON/OFF (PIN 37)
- Phone On - PON (PIN 35)
- Internal Power Switch
- Voltage Reference - VREG_MSME1.8 (PIN 77)
- USB (PINS 1, 3, 5, 7)
- General Purpose Input/Output Interface
- RTC Sleep
- Serial Interfaces and Handshake (Pins 11, 13, 15, 17, 19, 21, 23, 25)
- UART 2 (Pins 27, 29)
- Digital Audio Interface (Pins 12, 14, 16, 18)
- 32 kHz Output (PIN 56)
- Analog-to-Digital Inputs (PIN 44 and 74)
- Handset Microphone Input (PINS 65, 67)
- Handset Microphone BIAS Output (PINS 53, 63)
- Handset Speaker Output (PINS 71, 73)
- Headset Microphone Input (PIN 55)
- Headset Speaker Output Left and Right (PINS 57, 59)
- Headset Detect (PIN 47)
- Circuit Protection
- 5 USB Driver Installation
- 39 -
Headset Speaker Output Left And Right (PINS 57, 59)
Parameter Test Conditions Min Typ Max Units Notes
Both modes - HPH_LP and HPH_RN configured single ended, analog volume control = 0 dB
DAC to HPH_LP and HPH_RN
fullscale output
f = 1.02 kHz, 0 dBm 0.531 0.595 0.668 Vrms
Output DC level, HPH_LP and
HRH_RN wih respect to VSS
Input = 0.999 dBm 1.03 1.05 1.07 V
Output impedence 0.5 Ω
Voice Mode - HPH_LP and / or HPH_RN configured single ended, analog volume control = 0 dB
HPH_LP and HPH_RN output
power, 4% or less THD+N
f = 1.02 kHz, 0 dBm 17.6 22.1 27.9 mW 22 to 20 kHz
meas-
urement
bandwidth
DAC to HPH_LP and HPH_RN
output noise level
Input = 0.999 dBm, Fs = 8 kHz or
16 kHz, A-weighted
106 µVrms
Both modes - HPH_LP and HPH_RN configured differential (HPH_LP/HPH_RN), analog volume control = 0 dB
DAC to HPH_LP and HPH_RN
fullscale output
f = 1.02 kHz, 0 dBFS, 32 Ω load 1.06 1.19 1.34 Vrms
DAC to HPH_LP/HPH_RN gain
error relative to gain @ -3
dBFS
f = 1.02 kHz, -60 dBFS -1.2 1.2 dB Linearty
spot check
Output DC level, HPH_P and
HPH_N with respect to VSS
Input = .999 dBFs 1.03 1.05 1.07 V
Output impedence 1.0 Ω
Voice Mode - HPH_LP and / or HPH_RN configured differential (HPH_LP/HPH_RN), analog volume control = 0 dB
HPH_LP/HPH_RN output
power, 4% or less THD+N
f = 498 Hz, -3 dBFS, 32 Ω 17.6 22.1 27.9 mW 22 to 20 kHz
meas-
urement
bandwidth
DAC to HPH_LP/HPH_RN out-
put noise level
Input = 0.999 dBFS, Fs = 8 kHz, A-
weighted
212 µVrms 22 to 20 kHz
meas-
urement
bandwidth
Headset Detect (PIN 47)
The headset detect signal is an active low signal. The signal is low when a headset is inserted.
Circuit Protection
Other than very low level ESD protection within the module’s integrated circuits, the module
does not have any protection against ESD events or other excursions that exceed the
specified operating parameters. Only the USB port has onboard ESD/transient protection. We
do not recommend using additional external transient protection for this port as it will cause
too much capacitance on the lines.