GP214D Datasheet, PDF (4/15 Pages) List of Unclassifed Manufacturers – 1.4GHz DUAL PLL

GP214D
1.4GHz DUAL PLL
PROGRAMMING DESCRIPTION
SERIAL DATA INPUT AND TIMING
The programmable functions are accessed through the MCU serial data interface. The interface includes
clock (CK, pin 6), data (DATA, pin 7) and enable signal (EN, pin 8). Serial data controls programmable
reference counter and programmable counters in channel 1 and channel 2. The serial data is clocked in
on the rising edge of clock and transferred into the shift register composed of 17-bit data field and 2-bit
control field. When EN is high, stored data is latched. Data is entered LSB first.
0.1us
0.2us
0.2us
CK
DATA
EN
LSB
N1(R1)
N2(R2)
0.1us
0.2us
N17(R12)
GC2
MSB
GC1
0.1us
0.2us
0.2us
GROUP CODE AND LOCATION
The data stored in the shift register is loaded into one of four appropriate latches depending on the state
of group code (control bits) listed below.
Control Bits
GC2(MSB-1)
GC1(MSB)
0
0
1
0
0
1
1
1
Data Location
Control Latch
Ch 1 N Latch
Ch 2 N Latch
OSC R Latch
Version 1.2 (Jan. 2006)
4
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