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PIN 4:
PIN 5:
PIN 6:
PIN 7:
PIN 8 & 10:
PIN 9:
PIN 11 & 12: Used for driving portable HF speaker capsule. Symmetrical output.
PIN 13:
9gp_71gb.fm
RTS signal for asynchronic serial line number 1 (RS232). Used for data
communication between the GSM mobile phones and PC. When there
is other accessory than data cable connected to the mobile phone this
pin can be used to control the accessory power. Logical '1' turns the
accessory power on and logical '0' turns the accessory power off. With
MiniHF this same feature can be used to mute the audio lines.
If boot signal is 12V when resetting the phone, the phone will start
performing software from the BOOT ROM memory. This is used for
FLASH downloading. Otherwise this pin is used as an EXTERP pin to
get the analog audio out from the mobile phone. The analog audio is
connected to this pin via 10 uF capacitor and there is not any DC level
in audio out signal.
Charging current input, max. 1.0A. Connecting a charger to this pin will
also power on the mobile phone. Powering off the mobile happens with
EMMI command (see pins 14 & 15).
The headset detector signal is normally at logic '1' state (2.7V). When
pulling this signal to ground outside the mobile the mobile knows that
either the headset or the MiniHF car kit is connected to the phone.
When the mobile phone pulls this signal to ground it disables the
accessory regulator preventing the accessory to take power. With
MiniHF this same feature can be used to mute the audio lines. This can
be done with next circuit:
With this circuit the 100k resistor can be omitted if the in/out pin has an
internal pull-up when in input mode. The maximum voltage of VCC
connected to 100 kohm resistor in the accessory side is 2.7V. The in/
out pin is in output mode only when there is a need to power off an
accessory or to mute the audio lines of MiniHF car kit.
Asynchronic serial line number 1 (RS232).
The maximum current from the VBAT line is 300 mA.
Minimum load 32 ohm symmetrical, 150 ohm asymmetrical (with DC
coupling). Maximun power 25 mW.
Hook line for active headset and MiniHF detection line. This line is
normally at logic '1' state (2.7V). When pulling this signal to ground
after the headset accessory has been detected the mobile phone
assumes that the hook of the headset has been pressed.
If pins 13 and 7 have been pulled to ground and the charger has been
connected to pin 6 (CHARGE) within 100ms, the mobile phone
assumes that the connected accessory is MiniHF car kit.
Product: TGP71EU & TGP73EU /
08.02.2002
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