9ZX21501B Datasheet, PDF (11/16 Pages) Integrated Device Technology – 15-Output Differential Zbuffer for PCIe Gen2/3 and QPI

9ZX21501B
15-Output Differential Zbuffer for PCIe Gen2/3 and QPI
SMBusTable: PLL Mode, and Frequency Select Register
Byte 0 Pin #
Name
Control Function
Bit 7
3
PLL Mode 1
PLL Operating Mode Rd back 1
Bit 6
3
PLL Mode 0
PLL Operating Mode Rd back 0
Bit 5
Reserved
Bit 4
61/62
DIF_17_En
Output Control overrides OE# pin
Bit 3
58/59
DIF_16_En
Output Control overrides OE# pin
Bit 2
Reserved
Bit 1
Reserved
Bit 0
2
100M_133#
Frequency Select Readback
SMBusTable: Output Control Register
Byte 1 Pin #
Name
Bit 7
34/35
DIF_7_En
Bit 6
31/32
DIF_6_En
Bit 5
28/29
DIF_5_En
Bit 4
25/26
DIF_4_En
Bit 3
Bit 2
22/23
DIF_2_En
Bit 1
20/21
DIF_1_En
Bit 0
17/18
DIF_0_En
Control Function
Output Control overrides OE# pin
Output Control overrides OE# pin
Output Control overrides OE# pin
Output Control overrides OE# pin
Reserved
Output Control overrides OE# pin
Output Control overrides OE# pin
Output Control overrides OE# pin
SMBusTable: Output Control Register
Byte 2 Pin #
Name
Bit 7
56/57
DIF_15_En
Bit 6
Bit 5
53/54
DIF_13_En
Bit 4
49/50
DIF_12_En
Bit 3
46/47
DIF_11_En
Bit 2
43/44
DIF_10_En
Bit 1
Bit 0
37/38
DIF_8_En
Control Function
Output Control overrides OE# pin
Reserved
Output Control overrides OE# pin
Output Control overrides OE# pin
Output Control overrides OE# pin
Output Control overrides OE# pin
Reserved
Output Control overrides OE# pin
SMBusTable: Output Enable Pin Status Readback Register
Byte 3 Pin #
Name
Control Function
Bit 7
51
OE_RB12
Real Time readback of OE#12
Bit 6
48
OE_RB11
Real Time readback of OE#11
Bit 5
45
OE_RB10
Real Time readback of OE#10
Bit 4
Reserved
Bit 3
39
OE_RB8
Real Time readback of OE#8
Bit 2
36
OE_RB7
Real Time readback of OE#7
Bit 1
33
OE_RB6
Real Time readback of OE#6
Bit 0
30
OE_RB5
Real Time readback of OE#5
SMBusTable: Reserved Register
Byte 4 Pin #
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Control Function
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Type
R
R
0
1
See PLL Operating Mode
Readback Table
RW
Hi-Z
RW
Hi-Z
Enable
Enable
R
133MHz
100MHz
Default
Latch
Latch
1
1
1
0
0
Latch
Type
0
RW
RW
Hi-Z
RW
RW
RW
RW
Hi-Z
RW
1
Enable
Enable
Default
1
1
1
1
1
1
1
1
Type
0
RW
Hi-Z
RW
RW
Hi-Z
RW
RW
RW
Hi-Z
1
Enable
Enable
Enable
Default
1
1
1
1
1
1
1
1
Type
R
R
R
R
R
R
R
0
OE# pin Low
OE# pin Low
1
Default
Real time
OE# Pin High Real time
Real time
0
Real time
OE# Pin High ^{Real time}
Real time
Real time
Type
0
1
Default
0
0
0
0
0
0
0
0
IDT^® 15-Output Differential Zbuffer for PCIe Gen2/3 and QPI
11
1629C - 12/15/11