User Manual
EMMY-W1 series - User Manual
UBX-16015271 - R03 Product Information Interfaces
Page 16 of 46
Figure 10: PCM timing specification – Slave mode
Symbol
Parameter
Condition
Min.
Typ
Max.
Units
F
BCLK
-
-
-
2/2.048
-
MHz
Duty Cycle
BCLK
-
-
0.4
0.5
0.6
-
T
BCLK rise/fall
-
-
-
3
-
ns
T
DO
-
-
-
-
30
ns
T
DISU
-
-
15
-
-
ns
T
DIHO
-
-
10
-
-
ns
T
BFSU
-
-
15
-
-
ns
T
BFHO
-
-
10
-
-
ns
Table 10: PCM timing specification – Slave mode
2.5 GPIO interface
The General-Purpose I/O (GPIO) interface is used to implement user defined input and output signals to and from
the 88W8887 chip such as external interrupts and other user-defined I/Os. Main features of the GPIO interface
include:
User-defined GPIO (each I/O configured to either input or output)
Each GPIO independently controlled
Each I/O configurable to output bit from GPIO_OUT
The general functions associated with each GPIO pin is shown in Table 11: