User Guide
NSD-5
3. System Module PAMS Technical Documentation
Page 40 Nokia Corporation Issue 1 05/02
microphone or the external microphone.
When the PPH1 is used, the MCU software ignores the interrupt from HOOKINT since the
PPH1 uses the TALK key on the phone to answer/end a call.
Table 11 describes the detection for the audio accessories. For more detailed information,
refer to Reference 7.
Note:(1) L (logic low) is 0 - 0.5V and H (logic high) is Vdd - 0.6V
(2) This value will change, depending on charging and PCB layout because of the grounding between charger and
audio accessory. WhenPPH-1 is used, the charger should be connected and on.
Table 11: External audio accessory detection
Battery Interface
Signal Characteristics
In addition to VBAT output and the ground, the battery has two additional outputs:
BTEMP and BSI. BTEMP is used to indicate the battery temperature and BSI is used to
indicate the battery type. BTEMP also is used as an input of VIBRA pulse width modu-
lated signal for a battery with a built-in VIBRA. The Janette battery interface provides
detailed descriptions of these signals. For more information refer to this document.
BSI and BTEMP Connections
BTEMP Connections
A pull-up resistor to Vref is located on the phone side on the BETMP line. NTC pull-down
resistor is used in nickel batteries to give battery temperature information to the phone.
This is used by charging algorithm to change charging mode or terminate charging if the
battery temperature gets too high. The voltage level from this resistor divider is con-
nected to CCONT A/D input. See Figure 22 block diagram of the interface.
AUXOUT = “1.5 V”
HF_MUTE = “L”
EAD_HEADINT HOOKINT EAD (mV)
P&PHF
Speaker Muter
No accessory
L
(1)
H< 100N/A
LPS - 3 H H 431 - 742 Un - mute
JBA - 6 H H 395 - 485 Un - mute
HS (button open) H H 431 - 742 N/A
HS (button close) H L 290 - 362 N/A
PPH (built-in mic) Charging On
Charging Off
H
H
L or H
L or H
1102 - 1261
(2)
1102 - 1261
Un - mute
Un - mute
PPH (exter mic) Charging On
Charging Off
H
H
L or H
L or H
915 - 1067
(2)
915 - 1067
Un - mute
Un - mute
PPH without power H L or H 353 - 440 N/A