Armadillo-9
hardware manual ver.1.02
5.9. CON8 (Synchronous Serial / AC97 / I2S)
While the CON8 connector is used to connect a synchronous serial, AC97CODEC or audio CODEC
device, normal operation of the Armadillo9 is not guaranteed when using this connector. Table 5-8 shows
the pin assignment.
Table 5-8 CON8 Signal Assignment
No.
Signal Name
I/O
Function
1
GND
Power
Power supply (GND)
2
ASDI
I
Refer to Table 5-9 (PU: ASDI)
3
ARST*
O
Refer to Table 5-9 (CPU: ARST*)
4
ASDO
O
Refer to Table 5-9 CPU: ASDO)
5
ASYNC
Refer to Table 5-9 (CPU: ASYNC)
6
ABITCLK
Refer to Table 5-9 CPU: BITCLK)
7
+3.3V
Power
Power supply (+3.3V)
8
SSPRX1
I
Refer to Table 5-9 (CPU: SSPRX1)
9
SSPTX1
O
Refer to Table 5-9 (CPU: SSPTX1)
10
FREM1
Refer to Table 5-9 (CPU: SFRM1)
11
SCLK1
Refer to Table 5-9 (CPU: SCLK1)
12
GND
Power
Power supply (GND)
The functionality assigned to the CON8 pins can be switched by setting the EP9315 register. Three
modes are available: “Normal Mode”, “I2S on AC97 Mode” and “I2S on SSP Mode”, which can be selected
by rewriting “bit6: I2S on AC97” and “bit7: I 2S on SSP” of the DeviceCfg Register at 0x8093 0080.
Table 5-9 Pin Functionality in Each Mode
Pin Name
Normal Mode
I2S on AC97 Mode
I2S on SSP Mode
SSPRX1
SPI Serial Input
I2S Serial Input
SPI Serial Input
SSPTX1
SPI Serial Output
I2S Serial Output
SPI Serial Output
SFRM1
SPI Frame Clock
I2S Frame Clock
SPI Frame Clock
SCLK1
SPI Bit Clock
I2S Serial Clock
SPI Bit Clock
ASDI
AC97 Serial Input
AC97 Serial Input
I2S Serial Input
ASDO
AC97 Serial Output
AC97 Serial Output
I2S Serial Output
ASYNC
AC97 Frame Clock
AC97 Frame Clock
I2S Frame Clock
ABITCLK
AC97 Bit Clock
AC97 Bit Clock
I2S Serial Clock
ARST*
AC97 Reset
AC97 Reset
I2S Master Clock
12
