ICS9ERS3165
Embedded 64-Pin Industrial Temperature Range CK505 Compatible Clock
MLF Pin Description
Pin# Pin Name
TYPE DESCRIPTION
1
2
3
4
GNDREF
X2
PWR Ground pin for crystal oscillator circuit
OUT Crystal output, nominally 14.318MHz.
IN Crystal input, Nominally 14.318MHz.
X1
VDDREF
PWR Power pin for the REF outputs, 3.3V nominal.
3.3V 14.318MHz reference clock/3.3V tolerant low threshold input for CPU frequency
selection. Refer to input electrical characteristics for Vil_FS and Vih_FS values/
5
I/O
REF/FSLC/TEST_SEL
TEST_SEL: 3-level latched input to enable test mode. Refer to Test Clarification
Table.
I/O Data pin for SMBus circuitry, 5V tolerant.
IN Clock pin of SMBus circuitry, 5V tolerant.
6
7
SDATA
SCLK
3.3V PCI clock output or Clock Request control A for either SRC0 or SRC2 pair
The power-up default is PCI0 output, but this pin may also be used as a Clock
Request control of SRC pair 0 or SRC pair 2 via SMBus. Before configuring this pin
as a Clock Request Pin, the PCI output must first be disabled in byte 2, bit 0 of
SMBus address space . After the PCI output is disabled (high-Z), the pin can then be
set to serve as a Clock Request pin for either SRC pair 2 or pair 0 using the
CR#_A_EN bit located in byte 5 of SMBUs address space.
8
PCI0/CR#_A
I/O
Byte 5, bit 7
0 = PCI0 enabled (default)
1= CR#_A enabled.
Byte 5, bit 6 controls whether CR#_A controls SRC0 or SRC2 pair
Byte 5, bit 6
0 = CR#_A controls SRC0 pair (default),
1= CR#_A controls SRC2 pair
9
VDDPCI
PWR Power supply pin for the PCI outputs, 3.3V nominal
3.3V PCI clock output/Clock Request control B for either SRC1 or SRC4 pair
The power-up default is PCI1 output, but this pin may also be used as a Clock
Request control of SRC pair 1 or SRC pair 4 via SMBus. Before configuring this pin
as a Clock Request Pin, the PCI output must first be disabled in byte 2, bit 1 of
SMBus address space . After the PCI output is disabled (high-Z), the pin can then be
set to serve as a Clock Request pin for either SRC pair 1 or pair 4 using the
CR#_B_EN bit located in byte 5 of SMBUs address space.
10 PCI1/CR#_B
I/O
Byte 5, bit 5
0 = PCI1 enabled (default)
1= CR#_B enabled.
Byte 5, bit 4 controls whether CR#_B controls SRC1 or SRC4 pair
Byte 5, bit 4
0 = CR#_B controls SRC1 pair (default)
1= CR#_B controls SRC4 pair
3.3V PCI clock output / Trusted Mode Enable (TME) Latched Input. This pin is
sampled on power-up as follows
11 PCI2/TME
I/O 0 = Overclocking of CPU and SRC Allowed
1 = Overclocking of CPU and SRC NOT allowed
After being sampled on power-up, this pin becomes a 3.3V PCI Output
OUT 3.3V PCI clock output.
12 PCI3
3.3V PCI clock output / 27MH mode select for pin24, 25 strap. On powerup, the logic
I/O value on this pin determines the power-up default of DOT_96/SRC0 and
13 PCI4/27_SEL
27MHz/SRC1 output and the function table for the pin24 and pin25.
Free running PCI clock output and ITP/SRC8 enable strap. This output is not
affected by the state of the PCI_STOP# pin. On powerup, the state of this pin
I/O determines whether pins 53 and 54 are an ITP or SRC pair.
0 =SRC8/SRC8#
14 PCI5_F/ITP_EN
1 = ITP/ITP#
PWR Ground for PCI clocks.
15 GNDPCI
16 VDD48
PWR Power supply for USB clock, nominal 3.3V.
Fixed 48MHz USB clock output. 3.3V./ 3.3V tolerant input for CPU frequency
17 USB48M/FSLA
I/O
selection. Refer to input electrical characteristics for Vil_FS and Vih_FS values.
18 GND48
PWR Ground pin for the 48MHz outputs.
19 VDDI/O96MHz
PWR 1.05V to 3.3V from external power supply
True clock of SRC or DOT96. The power-up default function depends on
20 DOT96T/SRCT_LR0
21 DOT96C/SRCC_LR0
OUT
27_Select,1= SRC0, 0=DOT96
Complement clock of SRC or DOT96. The power-up default function depends on
OUT
27_Select,1= SRC0, 0=DOT96
22 GND
23 VDD
PWR Ground pin for the DOT96 clocks.
PWR Power supply for SRC / SE1 and SE2 clocks, 3.3V nominal.
IDT® Embedded 64-Pin Industrial Temperature Range CK505 Compatible Clock
1613C—02/08/12
6
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