WM8753 Wolfson Microelectronics plc, WM8753 Datasheet - Page 52

• Manufacturer Part Number: WM8753
• Description: HI FI AND TELEPHONY DUAL CODEC
• Manufacturer: Wolfson Microelectronics plc

Advanced Information
w
Note:
GPIO5 must not be used in 3-wire interface mode. GPIO5 pin is shared with 3-wire interface CSB.
Enabling GPIO5 as an output will prevent 3-wire writes to the WM8753L.
Table 49 GPIO Control
R27 (1Bh)
GPIO
Control (1)
R28 (1Ch)
GPIO
Control (2)
REGISTER
ADDRESS
4:3
2:0
8:6
5:3
2:0
BIT
GPIO5M[1:0]
GPIO4M[2:0]
GPIO3M[2:0]
GP2M[2:0]
GP1M[2:0]
LABEL
00
000
000
000
000
DEFAULT
Configures GPIO5 pin. (2-wire interface
mode only)
00 = Input only.
01 = INT from interrupt controller.
10 = Drive low.
11 = Drive high.
Configures GPIO4 pin.
000 = Input only.
001 = unused.
010 = input only with pull-down.
011 = Input only with pull-up.
100 = Drive low.
101 = Drive high.
110 = SDOUT from control interface
111 = INT from interrupt controller
Configures GPIO3 pin
000 = Input only.
001 to 011 Reserved.
100 = Drive low.
101 = Drive high.
110 = SDOUT from control interface.
111 = INT from interrupt controller.
Configures GP2/CLK2 pin when
CLK2EN=0
000 = Drive low.
001 = Drive high.
010 = SDOUT from control interface.
011 = INT from interrupt controller.
100 = ADC clock (=256 x fs)
101 = Hi-Fi DAC clock (=256 x fs)
110 = ADC clock divided by 2
111 = DAC clock divided by 2
Configures GP1/CLK1 pin when
CLK1EN=0
000 = Drive low.
001 = Drive high.
010 = SDOUT from control interface.
011 = INT from interrupt controller.
100 to 111 = reserved
DESCRIPTION
AI Rev 3.1 June 2004
WM8753L
52