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參數資料
| 型號： | ADUC845 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | ADC |
| 英文描述： | MicroConverter Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU |
| 中文描述： | MicroConverter的多通道ADC的24-/16-Bit與嵌入式62 kB閃存以及單周期控制器 |
| 文件頁數： | 91/108頁 |
| 文件大小： | 1109K |
| 代理商： | ADUC845 |
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ADuC845/ADuC847/ADuC848
Rev. A | Page 91 of 108
C1+
V+
C1–
C2+
C2–
V–
T2OUT
R2IN
V
CC
GND
T1OUT
R1IN
R1OUT
T1IN
T2IN
R2OUT
ADM3202
RS232 INTERFACE*
1
2
3
4
5
6
7
8
9
DV
DD
STANDARD D-TYPE
SERIAL COMMS
CONNECTOR TO
PC HOST
*EXTERNAL UART TRANSCEIVER INTEGRATED IN SYSTEM OR AS PART
OF AN EXTERNAL DONGLE AS DESCRIBED IN APPLICATION NOTE uC006.
0.1
μ
F
0.1
μ
F
0.1
μ
F
0.1
μ
F
RESET ACTIVE HIGH.
(NORMALLY OPEN)
35
34
43
44
1k
DV
DD
1k
2-PIN HEADER FOR
EMULATION ACCESS
(NORMALLY OPEN)
DOWNLOAD/DEBUG
ENABLE JUMPER
(NORMALLY OPEN)
32.768kHz
DV
DD
DV
DD
AV
DD
AV
DD
AGND
AGND
REFIN–
REFIN+
P1.0/AIN1
P1.1/AIN2
P1.6/I
EXC
1/AIN7
ADuC845/ADuC847/ADuC848
200mA/400mA
EXCITATION
CURRENT
RTD
R
5.6kV
P
E
XTAL2
XTAL1
R
R
T
D
D
D
CSP PACKAGE
0
11
4
5
6
7
8
56
1
17
18
19
22
36
51
37
38
50
23
0.1
μ
F
Figure 69. UART Connectivity in Typical System
In addition to the basic UART connections, users also need a
way to trigger the chip into download mode. This is accomplished
via a 1 k pull-down resistor that can be jumpered onto the
PSEN pin, as shown in Figure 69. To get the parts into download
mode, connect this jumper and power-cycle the device (or
manually reset the device, if a manual reset button is available),
and it is ready to receive a new program serially. With the
jumper removed, the device powers on in normal mode (and
runs the program) whenever power is cycled or RESET is
toggled. Note that PSEN is normally an output and that it is
sampled as an input only on the falling edge of RESET, that is, at
power-on or upon an external manual reset. Note also that if
any external circuitry unintentionally pulls PSEN low during
power-on or reset events, it could cause the chip to enter
download mode and fail to begin user code execution. To
prevent this, ensure that no external signals are capable of
pulling the PSEN pin low, except for the external PSEN jumper
itself or the method of download entry in use during a reset or
power-cycle condition.
Embedded Serial Port Debugger
From a hardware perspective, entry to serial port debug mode is
identical to the serial download entry sequence described
previously. In fact, both serial download and serial port debug
modes are essentially one mode of operation used in two
different ways.
Note that the serial port debugger is fully contained on the
device, unlike ROM monitor type debuggers, and, therefore, no
external memory is needed to enable in-system debug sessions.
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| ADUC845_12 | 制造商:AD 制造商全稱:Analog Devices 功能描述:MicroConverter?? Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU |
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| ADUC845BCP62-5 | 制造商:AD 制造商全稱:Analog Devices 功能描述:MicroConverter Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU |
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