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44409
Rev.
1.70
October 10
AMD SP5100 Databook
Signal Description
37
Pin Name
Type
Voltage
Functional Description
SATA_IS5#/CLK_REQ2#/
FANIN3/GPIO40
I/O
3.3 V
SATA Interlock Switch Port 5 (input) / PCI Express clock
request/ Fan Tach In3 / GPIO40
Note:
For each port there is a pin (SATA_IS) for sensing the status of the external interlock switch. If the
motherboard implements SATA interlock switches, it should connect the statuses of the switches to those pins. The
SP5100 will sense the statuses of those pins and can generate a PME or interrupt when the statuses change.
Normally, an inter-lock switch is required for supporting hot plug.
7.8
HD Audio Interface
Pin Name
Type
Voltage
Functional description
AZ_BITCLK
O
3.3 V
HD Audio Interface Bit Clock
AZ_RST#
O
S5_3.3V
HD Audio interface Reset
AZ_SDIN[2:0]/GPIO[44:42]
I/O
S5_3.3V
HD Audio Serial Data Input from Codec [2:0] /
GPIO [44:42]
AZ_SDIN3/GPIO46
I/O
S5_3.3V
HD Audio Serial Data Input from Codec 3/ GPIO 46
AZ_SDOUT
O
3.3 V
HD Audio Serial Data Output to Codec
AZ_SYNC
O
3.3 V
HD Audio Sync signal to Codec
7.9
Real Time Clock Interface
Pin Name
Type
Voltage
Functional Description
RTCCLK
I/O
S5_3.3V/VBAT
32-kHz output for internal RTC
VBAT
I
S5_3.3V/VBAT
RTC battery supply
X1
I
S5_3.3V/VBAT
RTC crystal oscillator input 1
X2
O
S5_3.3V/VBAT
RTC crystal oscillator input 2
7.10 Hardware Monitor
Note:
Hardware monitor support is available for voltage sensors, fan control, and digital TSI to AM3
processors. However, temperature monitoring is NOT supported. See the
SP5100 Schematic Review
Checklist
for how to terminate these signals if they are not used for either hardware monitor or GPIO
function.
Pin Name
Type
Voltage
Functional Description
FANOUT0/GPIO3
I/O
3.3 V (5-V Tolerance)
Fan Output 0 / GPIO 3
FANOUT1/GPIO48
I/O
3.3 V (5-V Tolerance)
Fan Output 1 / GPIO 48
FANOUT2/GPIO49
I/O
3.3 V (5-V Tolerance)
Fan Output 2 / GPIO 49
FANIN0/GPIO50
I/O
3.3 V (5-V Tolerance)
Fan Tachometer Input 0 / GPIO 50
FANIN1/GPIO51
I/O
3.3 V (5-V Tolerance)
Fan Tachometer Input 1 / GPIO 51
FANIN2/GPIO52
I/O
3.3 V (5-V Tolerance)
Fan Tachometer Input 2 / GPIO 52
CLK_REQ1#/SATA_IS4/
FANOUT3/GPIO39
I/O
3.3 V
PCI Express
®
Clock Request / SATA Interlock Switch
Port 4 (input) / Fan Output 3 / GPIO39
TEMP_COMM
I
Analog Ground
Temperature sensor diode current return path.
TEMPIN0*/GPIO61
I/O
3.3 V
Temperature Monitor Input 0* / GPIO 61
TEMPIN1*/GPIO62
I/O
3.3 V
Temperature Monitor Input 1* / GPIO 62
TEMPIN2*/GPIO63
I/O
3.3 V
Temperature Monitor Input 2* / GPIO 63