TCI6636K2H Datasheet, PDF (312/362 Pages) Texas Instruments – Multicore DSP+ARM KeyStone II System-on-Chip (SoC)

TCI6636K2H
Multicore DSP+ARM KeyStone II System-on-Chip (SoC)
SPRS835F—October 2013
PASS PLL power is supplied via the PASS PLL power-supply pin (AVDDA3). An external EMI filter circuit must be
added to all PLL supplies. See the Hardware Design Guide for KeyStone II Devices (in development) for detailed
recommendations.
Figure 10-29 PASS PLL Block Diagram
SYSCLK(P|N)
ALTCORECLK(P|N)
CORECLKSEL
PLL
PLLOUT
PLL
SYSCLKn
Controller
PLLM
PASS PLL
C66x
CorePac
PASSCLK(P|N)
PACLKSEL
VCO
/3
0
PLLOUT
Network
PLLD
CLKOD
Coprocessor
1
BYPASS
10.7.1 PASS PLL Local Clock Dividers
The clock signal from the PASS PLL Controller is routed to the Network Coprocessor. The Net CP module has two
internal dividers with fixed division ratios. See table Table 10-34.
Table 10-33 PASS PLL Clock Domain Module Internal Clock Dividers
Clock
Module
PLLOUT
Network Coprocessor
End of Table 10-33
Internal Clock Divider(s)
/13, /16
10.7.2 PASS PLL Control Registers
The PASS PLL, which is used to drive the Network Coprocessor, does not use a PLL controller. PASS PLL can be
controlled using the PAPLLCTL0 and PAPLLCTL1 registers located in the Bootcfg module. These MMRs
(memory-mapped registers) exist inside the Bootcfg space. To write to these registers, software must go through an
unlocking sequence using the KICK0 and KICK1 registers. For suggested configuration values, see 8.1.4 ‘‘System
PLL Settings’’ on page 231. See 8.2.3.4 ‘‘Kicker Mechanism (KICK0 and KICK1) Register’’ on page 240 for the
address location of the registers and locking and unlocking sequences for accessing these registers. These registers
are reset on POR only.
.
Figure 10-30 PASS PLL Control Register 0 (PASSPLLCTL0)
31
24
23
22
19
18
6
5
0
BWADJ[7:0]
BYPASS
CLKOD
PLLM
PLLD
RW-0000 1001
RW-1
RW-0001
RW-0000000010011
RW-000000
Legend: RW = Read/Write; -n = value after reset
312 TCI6636K2H Peripheral Information and Electrical Specifications
Copyright 2013 Texas Instruments Incorporated
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