
932S890C
RD890 SYSTEM CLOCK FOR AMD-BASED SERVERS
IDT
RD890 SYSTEM CLOCK FOR AMD-BASED SERVERS
4
932S890C
REV D 052011
Block Diagram
CPU PLL
SS capable
SRC PLL
SS capable
1GHz
SATA PLL
1GHz
USB48/SIO PLL
CPU(3:0)
HTT100(1:0)
SRC(13:0)
SATA
48M(1:0)
SIO(1:0)
DIFFERENTIAL
SINGLE-ENDED
REF(1:0)
14.3M
XTAL OSC
LOGIC
RESTORE#
SIO_SEL
X1
X2
932S890 Power Hookup
VDD
GND
1
4
SATA PLL and output
9
10
CPU PLL and outputs
19
18
HTT outputs
26
29
XTAL Osc and REF outputs
33
30
48MHz PLL and Outputs
33
36
SIO Outputs
41, 50, 59,
68
42, 49, 60,
67
SRC PLL and Outputs
Pin Number
Description
Table 2: IO_Vout select table
B5b2
B5b1
B5b0
IO _Vout
00
0
0.3V
00
1
0.4V
01
0
0.5V
01
1
0.6V
10
0
0.7V
10
1
0.8V
11
0
0.9V
11
1
1.0V