Texas Instruments Delfino C28346 DIM168 ControlCARD TMDSCNCD28346-168 TMDSCNCD28346-168 데이터 시트
제품 코드
TMDSCNCD28346-168
X1
XCLKIN
(3.3-V clock input
from external
oscillator)
On-chip
oscillator
X2
PLLSTS[OSCOFF]
OSCCLK
PLL
VCOCLK
5-bit multiplier PLLCR[DIV]
OSCCLK or
VCOCLK
CLKIN
OSCCLK
0
PLLSTS[PLLOFF]
n
n
≠
0
PLLSTS[DIVSEL]
External
Crystal or
Resonator
To
CPU
/1
/8
/2
/4
/4
SPRS516D – MARCH 2009 – REVISED AUGUST 2012
The PLL, clocking, watchdog and low-power modes, are controlled by the registers listed in
Table 3-11. PLL, Clocking, Watchdog, and Low-Power Mode Registers
NAME
ADDRESS
SIZE (x16)
DESCRIPTION
PLLSTS
0x00 7011
1
PLL Status Register
Reserved
0x00 7012 – 0x00 7018
7
Reserved
PCLKCR2
0x00 7019
1
Peripheral Clock Control Register 2
HISPCP
0x00 701A
1
High-Speed Peripheral Clock Pre-Scaler Register
LOSPCP
0x00 701B
1
Low-Speed Peripheral Clock Pre-Scaler Register
PCLKCR0
0x00 701C
1
Peripheral Clock Control Register 0
PCLKCR1
0x00 701D
1
Peripheral Clock Control Register 1
LPMCR0
0x00 701E
1
Low Power Mode Control Register 0
Reserved
0x00 701F
1
Reserved
PCLKCR3
0x00 7020
1
Peripheral Clock Control Register 3
PLLCR
0x00 7021
1
PLL Control Register
SCSR
0x00 7022
1
System Control and Status Register
WDCNTR
0x00 7023
1
Watchdog Counter Register
Reserved
0x00 7024
1
Reserved
WDKEY
0x00 7025
1
Watchdog Reset Key Register
Reserved
0x00 7026 – 0x00 7028
3
Reserved
WDCR
0x00 7029
1
Watchdog Control Register
Reserved
0x00 702A – 0x00 702C
3
Reserved
EXTSOCCFG
0x00 702D
1
External ADC SOC Configuration Register
Reserved
0x00 702E
1
Reserved
3.6.1
OSC and PLL Block
shows the OSC and PLL block.
Figure 3-9. OSC and PLL Block Diagram
The on-chip oscillator circuit enables a crystal/resonator to be attached to the C2834x devices using the
X1 and X2 pins. If the on-chip oscillator is not used, an external oscillator can be used in either one of the
following configurations:
X1 and X2 pins. If the on-chip oscillator is not used, an external oscillator can be used in either one of the
following configurations:
1. A 3.3-V external oscillator can be directly connected to the XCLKIN pin. The X2 pin should be left
unconnected and the X1 pin tied to V
SSK
. The logic-high level in this case should not exceed V
DDIO
.
2. A 1.8-V external oscillator can be directly connected to the X1 pin. The X2 pin should be left
unconnected and the XCLKIN pin tied to V
SS
. The logic-high level in this case should not exceed
V
DD18
.
54
Functional Overview
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