Sony Ericsson GR64 Manuel D’Utilisation
LZT 123 1834
67
5.16 Digital to Analogue Converter – DAC
Pin
Name
Direction Function
20 DAC Output
Pulse
width modulated signal
The GPIOx has dual functionality. In addition of being a fully programmable GPIO it
also has the capability of becoming a PWM output. This PWM can be used as a DAC
by implementing an RC-filter followed by an optional buffer.
also has the capability of becoming a PWM output. This PWM can be used as a DAC
by implementing an RC-filter followed by an optional buffer.
Figure 5.16-1 Typical arrangement for adapting PWM for a DAC function
5.17 Analogue to Digital Converters (ADIN1, ADIN2, ADIN3, ADIN4)
Pin
Name
Direction
Function
26
ADIN1
Input
ADC Input 1
27
ADIN2
Input
ADC Input 2
28
ADIN3
Input
ADC Input 3
13
ADIN4
Input
ADC Input 4/GPIO5
ADC pins is converted and stored in a register inside the wireless modem. When the
appropriate AT command is received by the wireless modem, the digital value stored
in the register is read.
appropriate AT command is received by the wireless modem, the digital value stored
in the register is read.
The module has a single precision 10-bit ADC, shared by a number of functions
within the module and also through the external interface connections (three
dedicated, one shared). The ADC sharing arrangement is shown below.
within the module and also through the external interface connections (three
dedicated, one shared). The ADC sharing arrangement is shown below.