TMS320F28030_14 Datasheet, PDF (49/158 Pages) Texas Instruments – Piccolo™ Microcontrollers

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(A)
INTOSC1TRIM Reg
TMS320F28030, TMS320F28031, TMS320F28032
TMS320F28033, TMS320F28034, TMS320F28035
SPRS584J – APRIL 2009 – REVISED OCTOBER 2013
Internal
OSC 1
OSC1CLK
(10 MHz)
OSCCLKSRC1
OSCE
CLKCTL[WDCLKSRCSEL]
0
WDCLK
CPU-Watchdog
(OSC1CLK on XRS reset)
1
CLKCTL[INTOSC1OFF]
1 = Turn OSC Off
CLKCTL[INTOSC1HALT]
1 = Ignore HALT
(A)
INTOSC2TRIM Reg
WAKEOSC
Internal _OSC2CLK
OSC 2
(10 MHz)
OSCE
1 = Turn OSC Off
CLKCTL[INTOSC2OFF]
1 = Ignore HALT
1
CLKCTL[INTOSC2HALT]
XCLK[XCLKINSEL]
0 = GPIO38
1 = GPIO19
0
CLKCTL[XCLKINOFF]
0
1
XCLKIN
GPIO19
or
GPIO38
0
XCLKIN
CLKCTL[OSCCLKSRCSEL]
0
OSCCLK
PLL
(B)
(OSC1CLK on XRS reset) Missing-Clock-Detect Circuit
1
CLKCTL[TRM2CLKPRESCALE]
CLKCTL[TMR2CLKSRCSEL]
10
Prescale
11
/1, /2, /4,
/8, /16
01
OSCCLKSRC2
CLKCTL[OSCCLKSRC2SEL]
SYNC
Edge
Detect
01, 10, 11
CPUTMR2CLK
00
SYSCLKOUT
XTAL
X1
(Crystal)
OSC
X2
EXTCLK
WAKEOSC
(Oscillators enabled when this signal is high)
CLKCTL[XTALOSCOFF]
0 = OSC on (default on reset)
1 = Turn OSC off
A. Register loaded from TI OTP-based calibration function.
B. See Section 3.7.4 for details on missing clock detection.
Figure 3-9. Clock Tree
Copyright © 2009–2013, Texas Instruments Incorporated
Functional Overview
49
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TMS320F28035