Advertisement
21.2. Input/Output Pins and External Connections
21.2.1. List of Input/Output Pins
Table 20.2.1.1 lists the SDAC output pins.
Pin name
I/O
PORT
O
SDACOUT_P
O
SDACOUT_N
O
21.2.2. External Connections
Figure 21.2.2.1 and 21.2.2.2 show the reference circuit between the SDAC and the external Audio AMP.
Please check and follow Audio AMP specification.
Single
SDACOUT_N
S1C31D50
Differential
SDACOUT_N
S1C31D50
21-2
Table 21.2.1 SDAC output pins.
Initial status
Hi-Z
External AMP enable signal output
O
SDAC positive sound signal output
O
SDAC negative sound signal output
Enable Control
PORT
pull-down(if AMP Enable is Sleep)
Please check AMP Enable specification
510Ω
39uF
Figure 21.2.2.1 Single Mode Connection
Enable Control
PORT
pull-down(if AMP Enable is Sleep)
Please check AMP Enable specification
510Ω
39uF
510Ω
SDACOUT_P
39uF
Figure 21.2.2.2 Differential Mode Connection
Seiko Epson Corporation
Function
Low Pass Filter: cutoff 8kHz
510Ω
Cin
Rin
IN-
39uF
Audio AMP
Cin
Rin
IN+
Low Pass Filter: cutoff 8kHz
Cin
Rin
510Ω
IN-
39uF
Audio AMP
510Ω
Cin
Rin
IN+
39uF
Enable
Enable
S1C31D50 TECHNICAL MANUAL
(Rev. 1.00)
Advertisement
