SP5611 Datasheet, PDF (10/12 Pages) Mitel Networks Corporation – 1·3GHz Bidirectional I2C Bus Controlled Synthesiser

SP5611
TEST MODES
As explained in the functional description, The SP5611 can
be programmed into a numb er of test modes. These are invoked
by programming Hex codes into byte 4, those most commonly
used being shown in Table 6.
Other codes will also apply due to don’t care conditions, which
are assumed to be 1 in the Table.
NOTE:
When looking at F_PD or F_COMP signals from ports P7 and P6. byte
should be sent twice, first to set the desired reference division
ratio then to switch on the chosen test mode.
The pulses can then be measured by simply connecting an
oscilloscope or counter to the relevant output pin on the test board.
Operation mode description
Normal operation, reference divider ratio = 1024
Normal operation, reference divider ratio = 512
Charge pump source (down), FL set to 0
Charge pump sink (up), FL set to 1
Port P7 = F_PD/2
Port P7 = F_PD, P6 = F_COMP
Charge pump disable, reference divider ratio = 512
Varactor line disable, reference divider ratio = 512
Charge pump and varactor linedisable, reference divider ratio = 512
Hex code (byte 4)
CP high mode
CC
CE
E2
E6
EA
EE
DE
CF
DF
CP low mode
8C
8E
A2
A6
AA
AE
9E
8F
9F
Table 5 Operation modes
10