WM9713LGEFL/RV Wolfson Microelectronics, WM9713LGEFL/RV Datasheet - Page 85

• Manufacturer Part Number: WM9713LGEFL/RV
• Description: Audio CODECs Stereo AC'97 CODEC T/P Interface
• Manufacturer: Wolfson Microelectronics

Specifications of WM9713LGEFL/RV

• Number Of Adc Inputs: 1
• Number Of Dac Outputs: 1
• Conversion Rate: 8 KSPs
• Interface Type: AC97
• Resolution: 12 bit
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-48
• Minimum Operating Temperature: - 25 C
• Number Of Channels: 1 ADC, 1 DAC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Pre-Production
Note: GPIO7 (Pin 11) has an independent RESETB function. This must be disabled using RSTDIS (Register 5Ah, bit 8)
before using Pin 11 as a GPIO / PENDOWN.
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The properties of the GPIOs are controlled through registers 4Ch to 52h, as shown below.
Table 62 GPIO Control
The following procedure is recommended for handling interrupts:
When the controller receives an interrupt, check register 54h. For each GPIO bit in descending order
of priority, check if the bit is ‘1’. If yes, execute corresponding interrupt routine, then write ‘0’ to
corresponding bit in 54h. If no, continue to next lower priority GPIO. After all GPIOs have been
checked, check if interrupt still present or no. If yes, repeat procedure. If no, then jump back to
process that ran before the interrupt.
If the system CPU cannot execute such an interrupt routine, it may be preferable to switch internal
signals (such as PENDOWN) directly onto the GPIO pins. However, in this case the interrupt signals
cannot be made sticky, and more GPIO pins are tied up both on the WM9713L and on the CPU.
4Ch
4Eh
50h
52h
54h
REGISTER
ADDRESS
n
n
n
n
n
BIT
GCn
GPn
GSn
GWn
GIn
LABEL
1
1
0
0
N/A
DEFAULT
GPIO Pin Configuration Control
0 = Output
1 = Input (GC9-15 are always inputs)
GPIO Pin Polarity / Type
Input (GCn = 1)
0 = Active low
1 = Acitve high
GPIO Pin Sticky Control
0 = Not sticky
1 = Sticky
GPIO Pin Wake-up Control
0 = No wake-up (no interrupts generated by
1 = Wake-up (generate interrupts from GPIO)
GPIO Pin Status
Read = Returns status of GPIO
Write = Writing 0 clears sticky bits
GPIO)
DESCRIPTION
PP Rev 3.2 September 2008
Output (GCn = 0)
0 = CMOS output
1 = Open drain
WM9713L
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