C Serial Control Bus - Sony Ericsson GR47/GR48 Integrator's Manual

2
5.17 External I
LZT 123 7589 R1A
5. SYSTEM CONNECTOR INTERFACE
If the voltage of the signal to be measured may be altered by the internal
circuitry of this shared signal, then the application should use ADC1,
ADC2 or ADC3 instead.
10#/ADC#
Figure 5.12 Input circuit for combined digital I/O and ADC pins

C Serial Control Bus

Pin Signal
29 SDA
30 SCL
2
The I C bus is controlled by embedded application script commands.
2
The external I C bus consists of two signals, SDA and SCL. This bus is
isolated from the radio device's internal I
of the radio device, in the event of the external I
The electrical characteristics are shown below.
Parameter
Frequency I
High or low I
Delay time after falling edge of I
CLK
Hold time after falling edge of I
CLK
2.75V
100kΩ
10kΩ
1nF
Dir Description
I/O
2
I C serial data
O
2
I C serial clock
2
C CLK
2
C CLK
2
C
2
C
2.75V
1MΩ
A
Analog IC
2
C bus to ensure proper operation
2
C bus being damaged.
Min. Typ. Max.
81.25 400
1.2
308 308-
1230
0
ADC
Units
kHz
µs
ns
ns
48