參數(shù)資料
型號: TMS320LF2404A
廠商: Texas Instruments, Inc.
元件分類: 數(shù)字信號處理
英文描述: DSP CONTROLLERS
中文描述: DSP控制器
文件頁數(shù): 14/132頁
文件大?。?/td> 1660K
代理商: TMS320LF2404A
SPRS145J JULY 2000 REVISED NOVEMBER 2004
14
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
pin functions (continued)
Table 2. LF240xA and LC240xA Pin List and Package Options
(Continued)
PIN NAME
LF2407A
(144-PGE)
2406A
(100-PZ)
LC2404A
(100-PZ)
2403A,
LC2402A
(64-PAG)
and
2402A
(64-PG)
DESCRIPTION
EXTERNAL INTERRUPTS, CLOCK (CONTINUED)
XINT1/
IOPA2
23
16
16
External user interrupt 1 or GPIO. Both XINT1 and XINT2
are
edge-sensitive.
The
programmable.
(
)
External user interrupt 2 and ADC start of conversion or
GPIO. External “start-of-conversion” input for ADC/GPIO.
Both XINT1 and XINT2 are edge-sensitive. The edge
polarity is programmable.
(
)
Clock output or GPIO. This pin outputs either the CPU clock
(CLKOUT) or the watchdog clock (WDCLK). The selection
is made by the CLKSRC bit (bit 14) of the system control
and status register (SCSR). This pin can be used as a GPIO
if not used as a clock output pin.
edge
polarity
is
XINT2/ADCSOC/
IOPD0
21
15
15
42
CLKOUT
/IOPE0
73
51
51
1
(
)
PDPINTB
137
95
95
Power drive protection interrupt input. This interrupt, when
activated, puts the PWM output pins (EVB) in the
high-impedance state should motor drive/power converter
abnormalities, such as overvoltage or overcurrent, etc.,
arise. PDPINTB is a falling-edge-sensitive interrupt.
(
)
OSCILLATOR, PLL, FLASH, BOOT, AND MISCELLANEOUS
XTAL1/CLKIN
123
87
87
24
PLL oscillator input pin. Crystal input to PLL/clock source
input to PLL. XTAL1/CLKIN is tied to one side of a reference
crystal.
XTAL2
124
88
88
25
Crystal output. PLL oscillator output pin. XTAL2 is tied to
one side of a reference crystal. This pin goes in the
high-impedance state when EMU1/OFF is active low.
PLLVCCA
IOPF6
12
10
10
39
PLL supply (3.3 V)
131
92
92
General-purpose I/O
(
)
BOOT_EN /
XF
BOOT_EN
121
86
23
Boot ROM enable, GPO, XF. This pin will be sampled as
input (BOOT_EN) to update SCSR2.3 (BOOT_EN bit)
during reset and then driven as an output signal for XF. After
reset, XF is driven high. ROM devices do not have boot
ROM, hence, no BOOT_EN modes. The BOOT_EN pin
must be driven with a passive circuit only.
PLL loop filter input 1
XF
121
86
86
23
(
)
PLLF
Bold, italicized pin names
indicate pin function after reset.
GPIO General-purpose input/output pin. All GPIOs come up as input after reset.
§It is highly recommended that VCCA be isolated from the digital supply voltage (and VSSA from digital ground) to maintain the specified accuracy
and improve the noise immunity of the ADC.
Only when all of the following conditions are met: EMU1/OFF is low, TRST is low, and EMU0 is high
#No power supply pin (VDD, VDDO, VSS, or VSSO) should be left unconnected. All power supply pins must be connected appropriately for proper
device operation.
LEGEND:
Internal pullup
Internal pulldown
(Typical active pullup/pulldown value is
±
16
μ
A.)
11
9
9
38
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