ADUC7020BCPZ62I-RL Analog Devices Inc, ADUC7020BCPZ62I-RL Datasheet - Page 89

• Manufacturer Part Number: ADUC7020BCPZ62I-RL
• Description: IC,MICROCONTROLLER,16-BIT,ARM7 CPU,CMOS,LLCC,40PIN,PLASTIC
• Manufacturer: Analog Devices Inc
• Series: MicroConverter® ADuC7xxxr

Specifications of ADUC7020BCPZ62I-RL

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 44MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART
• Peripherals: PLA, PWM, PSM, Temp Sensor, WDT
• Number Of I /o: 14
• Program Memory Size: 62KB (62K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 5x12b; D/A 4x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 40-LFCSP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: EVAL-ADUC7020QSZ - KIT DEV ADUC7020 QUICK STARTEVAL-ADUC7020MKZ - KIT MINI DEV FOR ADUC7026/7027
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

POWER-ON RESET OPERATION
An internal power-on reset (POR) is implemented on the
ADuC7019/20/21/22/24/25/26/27/28/29. 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
by this time. Likewise, on power-down, the internal POR holds
the part in reset until LV
Figure 82 illustrates the operation of the internal POR in detail.
TYPICAL SYSTEM CONFIGURATION
A typical ADuC7020 configuration is shown in Figure 83. It summarizes some of the hardware considerations discussed in the previous
sections. The bottom of the CSP package has an exposed pad that must 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
DD
DD
reaches a stable 2.7 V minimum level
DV
DD
drops below 2.35 V.
DV
10Ω
DD
0.01µF
10
1
2
3
4
5
6
7
8
9
GND
DAC0
TMS
TDI
P0.0
40
11
39
12
REF
38
13
ADuC7020
AV
37
14
DD
36
15
DD
0.47µF
DV
0.47µF
35
16
below 2.35 V
DD
34
17
Figure 83. Typical System Configuration
33
18
DD
XCLKO
XCLKI
32
19
rises
31
20
Rev. C | Page 89 of 96
30
29
28
27
26
25
24
23
22
21
DV
DD
1kΩ
32.768kHz
ADuC7019/20/21/22/24/25/26/27/28/29
RS232 INTERFACE*
* EXTERNAL UART TRANSCEIVER INTEGRATED IN SYSTEM OR AS
PART OF AN EXTERNAL DONGLE AS DESCRIBED IN uC006.
AV
DD
10µF
1.5Ω
IOV
LV
POR
RST
DD
DD
1
2
3
4
5
6
7
8
270Ω
C1+
V+
C1–
C2+
C2–
V–
T2
R2
2.35V TYP
Figure 82. Internal Power-On Reset Operation
ADM3202
OUT
IN
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
16
15
14
13
12
11
10
9
OUT
GND
SD
IN
128ms TYP
0.12ms TYP
0.1µF
STANDARD D-TYPE
3.3V
2.6V
CONNECTOR TO
SERIAL COMMS
PC HOST
1
2
3
4
5
6
7
8
9
2.35V TYP