EVAL-ADUC7026QSPZ Analog Devices Inc, EVAL-ADUC7026QSPZ Datasheet - Page 86

• Manufacturer Part Number: EVAL-ADUC7026QSPZ
• Description: KIT DEV ADUC7026/7027 QUICK PLUS
• Manufacturer: Analog Devices Inc
• Series: QuickStart™ PLUS Kitr
• Type: MCUr

Specifications of EVAL-ADUC7026QSPZ

• Contents: Evaluation Board, Power Supply, Cable, Software, Emulator and Documentation
• Silicon Manufacturer: Analog Devices
• Core Architecture: ARM
• Core Sub-architecture: ARM7TDMI
• Silicon Core Number: ADuC7026
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: ADuC7026
• Lead Free Status / Rohs Status: Compliant

ADuC7019/20/21/22/24/25/26/27/28
POWER-ON RESET OPERATION
An internal power-on reset (POR) is implemented on the
ADuC7019/20/21/22/24/25/26/27/28. For LV
typical, the internal POR holds the part in reset. As LV
above 2.35 V, an internal timer times out for typically 128 ms
before the part is released from reset. The user must ensure that
the power supply IOV
level by this time. Likewise, on power-down, the internal POR
holds the part in reset until LV
Figure 81 illustrates the operation of the internal POR in detail.
TYPICAL SYSTEM CONFIGURATION
A typical ADuC7020 configuration is shown in Figure 82. It summarizes some of the hardware considerations discussed in the previous
sections. The bottom of the CSP package has an exposed pad that needs to be soldered to a metal plate on the board for mechanical
reasons. The metal plate of the board can be connected to ground.
1kΩ
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
DV
DD
+
–
TRST
TDI
TMS
TCK
TDO
DV
DD
DV
DD
10Ω
DD
has reached a stable 2.7 V minimum
0.01µF
10
1
2
3
4
5
6
7
8
9
GND
DAC0
TMS
TDI
P0.0
40
11
DD
39
12
REF
has dropped below 2.35 V.
38
13
AV
ADuC7020
37
14
DD
36
15
DV
0.47µF
0.47µF
35
16
DD
DD
34
17
below 2.35 V
33
18
Figure 82. Typical System Configuration
XCLKO
XCLKI
32
19
DD
31
20
rises
30
29
28
27
26
25
24
23
22
21
Rev. B | Page 86 of 92
DV
DD
1kΩ
32.768kHz
RS232 INTERFACE*
* EXTERNAL UART TRANSCEIVER INTEGRATED IN SYSTEM OR AS
PART OF AN EXTERNAL DONGLE AS DESCRIBED IN uC006.
AV
DD
1.5Ω
10µF
IOV
LV
POR
RST
DD
DD
2.35V TYP
Figure 81. Internal Power-On Reset Operation
1
2
3
4
5
6
7
8
270Ω
C1+
V+
C1–
C2+
C2–
V–
T2
R2
OUT
IN
ADM3202
DV
DD
10µF
R1
R2
T1
GND
R1
T1
T2
V
OUT
OUT
OUT
CC
NOT CONNECTED IN THIS EXAMPLE
IN
IN
IN
ADP3333-3.3
128ms TYP
16
15
14
13
12
11
10
OUT
9
GND
0.12ms TYP
SD
IN
3.3V
2.6V
0.1µF
STANDARD D-TYPE
2.35V TYP
CONNECTOR TO
SERIAL COMMS
PC HOST
1
2
3
4
5
6
7
8
9