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參數(shù)資料
| 型號： | TMS320F2812PBKS |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Adjustable 1.24-16V ±1% Tolerance, 0.05-20mA Shunt Regulator; Package: TSOP-5 / SOT23-5; No of Pins: 5; Container: Tape and Reel; Qty per Container: 3000 |
| 中文描述： | 數(shù)字信號處理器 |
| 文件頁數(shù)： | 17/123頁 |
| 文件大小： | 1205K |
| 代理商： | TMS320F2812PBKS |
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www.ti.com
TMS320F2808, TMS320F2806
TMS320F2801, UCD9501
Digital Signal Processors
SPRS230F–OCTOBER 2003–REVISED SEPTEMBER 2005
Table 2-2. Signal Descriptions
PIN NO.
NAME
DESCRIPTION
(1)
PZ PIN
#
GGM
BALL #
JTAG
JTAG test reset with internal pulldown. TRST, when driven high, gives the scan system control of
the operations of the device. If this signal is not connected or driven low, the device operates in its
functional mode, and the test reset signals are ignored.
NOTE: Do not use pullup resistors on TRST; it has an internal pull-down device. TRST is an active
high test pin and must be maintained low at all times during normal device operation. In a low-noise
environment, TRST may be left floating. In other instances, an external pulldown resistor is
highly
recommended
. The value of this resistor should be based on drive strength of the debugger pods
applicable to the design. A 2.2-k
resistor generally offers adequate protection. Since this is
application-specific, it is recommended that each target board is validated for proper operation of
the debugger and the application. (I,
↓
)
JTAG test clock with internal pullup (I,
↑
)
JTAG test-mode select (TMS) with internal pullup. This serial control input is clocked into the TAP
controller on the rising edge of TCK. (I,
↑
)
JTAG test data input (TDI) with internal pullup. TDI is clocked into the selected register (instruction
or data) on a rising edge of TCK. (I,
↑
)
JTAG scan out, test data output (TDO). The contents of the selected register (instruction or data)
are shifted out of TDO on the falling edge of TCK. (O/Z 8 mA drive)
Emulator pin 0. When TRST is driven high, this pin is used as an interrupt to or from the emulator
system and is defined as input/output through the JTAG scan. (I/O/Z, 8 mA drive
↑
)
Emulator pin 1. When TRST is driven high, this pin is used as an interrupt to or from the emulator
system and is defined as input/output through the JTAG scan. (I/O/Z, 8 mA drive,
↑
)
FLASH
3.3-V Flash Core Power Pin. This pin should be connected to 3.3 V at all times.
Test Pin. Reserved for TI. Must be left unconnected. (I/O)
Test Pin. Reserved for TI. Must be left unconnected. (I/O)
CLOCK
Output clock derived from SYSCLKOUT. XCLKOUT is either the same frequency, one-half the
frequency, or one-fourth the frequency of SYSCLKOUT. This is controlled by the bits 1, 0
(XCLKOUTDIV) in the XCLK register. At reset, XCLKOUT = SYSCLKOUT/4. The XCLKOUT signal
can be turned off by setting XCLKOUTDIV to 3. Unlike other GPIO pins, the XCLKOUT pin is not
placed in high-impedance state during a reset. (O/Z, 8 mA drive).
External Oscillator Input. This pin is to feed a clock from an external 3.3-V oscillator. In this case,
the X1 pin must be tied to GND. If a crystal/resonator is used (or if an external 1.8-V oscillator is
used to feed clock to X1 pin), this pin must be tied to GND. (I)
Internal/External Oscillator Input. To use the internal oscillator, a quartz crystal or a ceramic
resonator may be connected across X1 and X2. The X1 pin is referenced to the 1.8-V core digital
power supply. A 1.8-V external oscillator may be connected to the X1 pin. In this case, the XCLKIN
pin must be connected to ground. If a 3.3-V external oscillator is used with the XCLKIN pin, X1 must
be tied to GND. (I)
Internal Oscillator Output. A quartz crystal or a ceramic resonator may be connected across X1 and
X2. If X2 is not used it must be left unconnected. (O)
RESET
Device Reset (in) and Watchdog Reset (out).
Device reset. XRS causes the device to terminate execution. The PC will point to the address
contained at the location 0x3FFFC0. When XRS is brought to a high level, execution begins at the
location pointed to by the PC. This pin is driven low by the DSP when a watchdog reset occurs.
During watchdog reset, the XRS pin is driven low for the watchdog reset duration of 512 OSCCLK
cycles. (I/OD,
↑
)
The output buffer of this pin is an open-drain with an internal pullup (100
μ
A, typical). It is
recommended that this pin be driven by an open-drain device.
ADC SIGNALS
ADC Group A, Channel 7 input (I)
ADC Group A, Channel 6 input (I)
TRST
84
A6
TCK
75
A10
TMS
74
B10
TDI
73
C9
TDO
76
B9
EMU0
80
A8
EMU1
81
B7
VDD3VFL
TEST1
TEST2
96
97
98
C4
A3
B3
XCLKOUT
66
E8
XCLKIN
90
B5
X1
88
E6
X2
86
C6
XRS
78
B8
ADCINA7
ADCINA6
16
17
F3
F4
(1)
I = Input, O = Output, Z = High impedance, OD = Open drain,
↑
= Pullup,
↓
= Pulldown
Introduction
17
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