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5P49EE515NDGI

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24
IDT5P49EE515
VERSACLOCK
®
LOW POWER CLOCK GENERATOR EEPROM CLOCK GENERATOR
IDT®
VERSACLOCK
®
LOW POWER CLOCK GENERATOR 7
IDT5P49EE515 REV H 101711
SEL[1:0] Function
The IDT5P49EE515 can support up to three unique
configurations. Users may pre-program all configurations,
selected using SEL[1:0] pins. Alternatively, users may use
I2C interface to configure these registers on- the-fly.
Always power with SEL1=1 and/or SEL0=1.
Configuration OUTx IO Standard
Users can configure the individual output IO standard from
a single 1.8V power supply. Each output can support 1.8V/
2.5V or 3.3V LVCMOS. VDDO1 must have the highest
voltage of any pin on the device. VDDO2 may have any
value between 1.8V and VDDO1.
Programming the Device
I
2
C may be used to program the IDT5P49EE515.
– Device (slave) address = 7'b1101010
I
2
C Programming
The IDT5P49EE515 is programmed through an I
2
C-Bus
serial interface, and is an I
2
C slave device. The read and
write transfer formats are supported. The first byte of data
after a write frame to the correct slave address is interpreted
as the register address; this address auto-increments after
each byte written or read.
The frame formats are shown in the following illustration.
Framing
First Byte Transmitted on I
2
C Bus
SEL1 SEL0 Configuration Selections
0 0 Power Down/Sleep Mode
0 1 Select CONFIG0
1 0 Select CONFIG1
1 1 Select CONFIG2
IDT5P49EE515
VERSACLOCK
®
LOW POWER CLOCK GENERATOR EEPROM CLOCK GENERATOR
IDT®
VERSACLOCK
®
LOW POWER CLOCK GENERATOR 8
IDT5P49EE515 REV H 101711
External I
2
C Interface Condition
EEPROM Interface
The IDT5P49EE515 can store its configuration in an internal
EEPROM. The contents of the device's internal
programming registers can be saved to the EEPROM by
issuing a save instruction (ProgSave) and can be loaded
back to the internal programming registers by issuing a
restore instruction (ProgRestore).
To initiate a save or restore using I
2
C, only two bytes are
transferred. The Device Address is issued with the
read/write bit set to “0”, followed by the appropriate
command code. The save or restore instruction executes
after the STOP condition is issued by the Master, during
which time the IDT5P49EE515 will not generate
Acknowledge bits. The IDT5P49EE515 will acknowledge
the instructions after it has completed execution of them.
During that time, the I
2
C bus should be interpreted as busy
by all other users of the bus.
On power-up of the IDT5P49EE515, an automatic restore is
performed to load the EEPROM contents into the internal
programming registers. The IDT5P49EE515 will be ready to
accept a programming instruction once it acknowledges its
7-bit I
2
C address.
Progwrite
Progwrite Command Frame
Writes can continue as long as a Stop condition is not sent and each byte will increment the register address.
IDT5P49EE515
VERSACLOCK
®
LOW POWER CLOCK GENERATOR EEPROM CLOCK GENERATOR
IDT®
VERSACLOCK
®
LOW POWER CLOCK GENERATOR 9
IDT5P49EE515 REV H 101711
Progread
Note: If the expected read command is not from the next higher register to the previous read or write command, then set a
known “read” register address prior to a read operation by issuing the following command:
Prior to Progread Command Set Register Address
The user can ignore the STOP condition above and use a repeated START condition instead, straight after the slave
acknowledgement bit (i.e., followed by the Progread command):
Progread Command Frame
Progsave
Note:
PROGWRITE is for writing to the IDT5P49EE515 registers.
PROGREAD is for reading the IDT5P49EE515 registers.
PROGSAVE is for saving all the contents of the
IDT5P49EE515 registers to the EEPROM.
PROGRESTORE is for loading the entire EEPROM
contents to the IDT5P49EE515 registers.
Progrestore
Note:
During PROGRESTORE, outputs will be turned off to
ensure that no improper voltage levels are experienced
before initialization.
SAddressR/W
ACK ID Byte ACK Data_1 ACK Data_2 ACK Data_last NACK P
7-bits 1 1-bit 8-bits 1-bit 8-bits 1-bit 8-bits 1-bit 8-bits 1-bit
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24

5P49EE515NDGI

Mfr. #:
Buy 5P49EE515NDGI
Manufacturer:
IDT
Description:
Clock Generators & Support Products PROGRAMMABLE PLL LOW POWER
Lifecycle:
New from this manufacturer.
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