AK4118A Datasheet, PDF (34/56 Pages) Asahi Kasei Microsystems – High Feature 192kHz 24bit Digital Audio I/F Transceiver

[AK4118A]
■ GPIO controller
The AK4118A has 8 input/output port pins. Set GP0~GP7 pins by GPDR register for data direction, GPSCR register for
the pin level setting and GPLR register for pin level reading. Table 37~40 shows the pin state at setting or internal node
state of GPIO registers, BCU bit, TX1E/TX0E bit and VIN E bit.
VIN GP0
Register Setting
Register Read Internal Node
VINE GPE GPDR GPSCR
GPLR
VIN I
Pin State VIN GP0 pin
1
x
x
x
L
VIN
I
VIN
0
x
0
x
GPI
L
I
GPI
0
x
1
Valid
GPSCR
L
O
GPSCR
Table 18. VINGP0 pin and Internal Statement (x: Don’t care)
GP1
Register Setting
Register Read
GPE GPDR GPSCR
GPLR
Pin State GP1 pin
x
0
x
GPI
I
GPI
x
1
x
GPSCR
O
GPSCR
TX0/1 GP2/3
Table 19. GP1 pin and Internal Statement (x: Don’t care)
Register Setting
Register Read
TX E GPE GPDR GPSCR
GPLR
Pin State TX GP pin
1
x
x
x
L
O
RX
0
0
x
x
L
O
L
0
1
0
x
GPI
I
GPI
0
1
1
Valid
GPSCR
O
GPSCR
Table 20. TX0/1 GP2/3 pin and Internal Statement (x: Don’t care)
B/C/U/VOUT GP4/5/6/7
Register Setting
Register Read
BCU GPE GPDR GPSCR
GPLR
Pin State BCUV GP pin
1
x
x
x
L
O
BCUV OUT
0
0
x
x
Data Hold
O
L
0
1
0
x
GPI
I
GPI
0
1
1
Valid
GPSCR
O
GPSCR
Table 21. B/C/U/VOUT GP4/5/6/7 pin and Internal Statement (x: Don’t care)
MS1130-E-02
- 34 -
2009/12