RM0082
RS_Telecom IP
Doc ID 018672 Rev 1
767/844
The various sub blocks of Telecom IP are describes in the following sections:-
34.4.1
Regs and regs_rw blocks
These blocks contain the set of telecom programming registers which are described in detail
in the Programmer’s Model
34.4.2 TDM
clock
block
The TDM clock block generates the clock in Master mode and recovers the clock in slave
mode. This clock internally is named int_CLK and is used by all the blocks relative to TDM.
The block diagram of this cell is presented here below.
Figure 83.
TDM clock cell block diagram
Externally the TDM clock block is connected to the four customization clock pins (PL_CLK1,
PL_CLK2, PL_CLK3 & PL_CLK4) of the device plus the CLK pin (PL_GPIO35) that is used
in slave mode.
●
PL_CLK1 outputs a clock generated either from pll2 or ClkR_synt(3) {frequency
synthesizer output 3}.
●
PL_CLK2 outputs the internal int_CLK signal
●
PL_CLK3 outputs either the inverted int_CLK signal, or the clock source selected by
the block. This feature allows delivering a clock to an external master device.
●
PL_CLK4 is an input targeted to receive a clock from an oscillator.
DIV 15-0
DIV_CPT
(16bit)
ACT
M/S
bypass
‘0’
ClkR_Synt(3)
PL_CLK4
CLKSM
Isrc2-0
CLKSM
inv
tck2
Int_CLK
‘0’
‘0’
CLKo1-0
Int_CLK
Internal_clock
CLKo1-0
‘0’
CLR_Pll2
ClkR_Synt(3)
MIIC1-0
PL_CLK1
PL_CLK3
PL_CLK2
PL_GPIO
35
ClkR_osc1
PL_CLK4