TCC720 Datasheet, PDF (54/143 Pages) List of Unclassifed Manufacturers – 32-bit RISC Microprocessor For Digital Media Player

TCC720
32-bit RISC Microprocessor for Digital Media Player
Dec. 16. 2002
CLOCK GENERATOR
Preliminary Spec 0.51
7 CLOCK GENERATOR
7.1 Functional Description
In TCC720, there are a lot of peripherals for which has different operating frequency. To support
an appropriate stable clock to each other peripherals, TCC720 has clock generator unit and for
considering power consumption there is also power management unit that can manage several
operating modes, such as initialization mode, normal operation mode, idle mode, stop mode.
The simple block diagram of clock generator is as followings.
PWRDN
XIN
PLLmode
DIVCLK1
WAITGEN
[18]
0
MUX
1
PLL
i_XIN
PLLOUT
i_XIN
PLLOUT
XTIN
0
MUX
1
PCLK source
[22] _SCLKmode
0
1 MUX
2
[15:14] ^DCLKmode
SCK GEN
DCLK GEN
i_XIN
WAIT
PLLOUT
FCLK
HCLK
PCLK
DCLK
0
1 MUX
2
[15:14] ^EXCLKmode
0
1 MUX
2
[15:14] ^UTCLKmode
0
1 MUX
2
[7:6] ^UBCLKmode
EXTCLK
GEN
UTCLK
GEN
UBCLK
GEN
EXTCLK
UTCLK
UBCLK
0
1 MUX
2
[7:6]
0
1 MUX
2
[7:6]
TCLKmode
GCLKmode
TCLK GEN
GCLK GEN
Figure 7.1 Clock Generator Block Diagram
TCLK
GCLK
7-1