Si5327-EVB Silicon Laboratories Inc, Si5327-EVB Datasheet - Page 49

• Manufacturer Part Number: Si5327-EVB
• Description: MCU, MPU & DSP Development Tools SI5327 EVAL BOARD
• Manufacturer: Silicon Laboratories Inc

Specifications of Si5327-EVB

• Processor To Be Evaluated: Si5327
• Interface Type: I2C, SPI
• Operating Supply Voltage: 3.3 V
• Lead Free Status / Rohs Status: Details

7. Pin Descriptions: Si5327
19, 20, 30,
Note: Internal register names are indicated by underlined italics, e.g., INT_PIN. See Section “5.Register Map”.
2, 9, 14,
Pin #
33
1
3
INT_LOS1
Pin Name
RST
NC
I/O
O
I
INT_LOS1
Signal Level
LOS2
LVCMOS
LVCMOS
GND
VDD
RST
NC
XB
NC
XA
1
2
3
4
5
6
7
8
9
36
10 11 12 13 14 15 16 17
35
External Reset.
Active low input that performs external hardware reset of device.
Resets all internal logic to a known state and forces the device reg-
isters to their default value. Clock outputs are tristated during reset.
The part must be programmed after a reset or power on to get a
clock output. See the Si53xx Family Reference Manual for details.
This pin has a weak pull-up.
No Connection.
Leave floating. Make no external connections to this pin for normal
operation.
Interrupt/CKIN1 LOS Indicator.
This pin functions as a device interrupt output or an alarm output for
CKIN1. If used as an interrupt output, INT_PIN must be set to 1. The
pin functions as a maskable interrupt output with active polarity con-
trolled by the INT_POL register bit.
If used as an alarm output, the pin functions as a LOS alarm indica-
tor for CKIN1. Set CK1_BAD_PIN = 1 and INT_PIN = 0.
0 = CKIN1 present
1 = LOS on CKIN1
The active polarity is controlled by CK_BAD_POL. If no function is
selected, the pin tristates.
Preliminary Rev. 0.4
34
33
GND
Pad
32
31
30
29
28
18
27
26
25
24
23
22
21
20
19
Description
SDI
A2_SS
A1
A0
SDA_SDO
SCL
CKSEL
NC
NC
Si5327
49