ADUC7034BCPZ-RL Analog Devices Inc, ADUC7034BCPZ-RL Datasheet - Page 104
![IC,Battery Management,LLCC,48PIN,PLASTIC](/photos/6/50/65022/cp-48-8_sml.jpg)
ADUC7034BCPZ-RL
Manufacturer Part Number
ADUC7034BCPZ-RL
Description
IC,Battery Management,LLCC,48PIN,PLASTIC
Manufacturer
Analog Devices Inc
Series
MicroConverter® ADuC7xxxr
Datasheet
1.ADUC7034BCPZ-RL.pdf
(136 pages)
Specifications of ADUC7034BCPZ-RL
Core Processor
ARM7
Core Size
16/32-Bit
Speed
20.48MHz
Connectivity
LIN, SPI, UART/USART
Peripherals
POR, PSM, Temp Sensor, WDT
Number Of I /o
9
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
3.5 V ~ 18 V
Data Converters
A/D 2x16b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 115°C
Package / Case
48-LFCSP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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ADuC7034
UART SERIAL INTERFACE
The ADuC7034 features a 16,450-compatible UART. The UART
is a full-duplex, universal, asynchronous receiver/transmitter. A
UART performs serial-to-parallel conversion on data characters
received from a peripheral device and performs parallel-to-serial
conversion on data characters received from the ARM7TDMI.
The UART features a fractional divider that facilitates high
accuracy baud rate generation and a network addressable mode.
The UART functionality is available on the GPIO_5/RxD and
GPIO_6/TxD pins of the ADuC7034.
The serial communication adopts an asynchronous protocol that
supports various word lengths, stop bits, and parity generation
options selectable in the configuration register.
BAUD RATE GENERATION
The ADuC7034 features two methods of generating the UART
baud rate: normal 450 UART baud rate generation and ADuC7034
fractional divider baud rate generation.
Normal 450 UART Baud Rate Generation
The baud rate is a divided version of the core clock using the
values in the COMDIV0 and COMDIV1 MMRs (each is a 16-bit
value, DL). The standard baud rate generator formula is
Table 78 lists common baud rate values.
Table 78. Baud Rate Using the Standard Baud Rate Generator
Baud Rate (bps)
9600
19,200
115,200
9600
19,200
115,200
Baud
Rate
=
2
CD
CD
0
0
0
3
3
3
20
×
.
16
48
DL
0x43
0x21
0x6
0x8
0x4
0x1
×
MHz
2
×
DL
Actual Baud Rate
9552
19,394
106,667
10,000
20,000
80,000
% Error
0.50%
1.01%
7.41%
4.17%
4.17%
30.56%
Rev. B | Page 104 of 136
(1)
ADuC7034 Fractional Divider Baud Rate Generation
The fractional divider combined with the normal baud rate gen-
erator allows the generation of accurate, high speed baud rates.
Calculation of the baud rate using a fractional divider is as follows:
where:
CD is the clock divider.
DL is the divisor latch.
M is the integer part of the divisor; a fractional divider divides
an input by a nonwhole number M.N.
N is the fractional part of the divisor; a fractional divider
divides an input by a nonwhole number M.N.
Table 79 lists common baud rate values.
Table 79. Baud Rate Using the Fractional Baud Rate Generator
Baud
Rate
(bps)
9600
19,200
115,200
Baud
M
+
CLOCK
2048
CORE
Figure 42. Fractional Divider Baud Rate Generation
Rate
N
CD
0
0
0
=
=
/(M+N/2048)
DL
0x42
0x21
0x5
Baud
2
CD
/2
×
16
Rate
M
1
1
1
×
20
20
DL
×
.
FBEN
48
N
21
21
228
.
2
48
CD
×
MHz
2
MHz
×
×
16
Actual
Baud Rate
9598.55
19,197.09
115,177.51
(
/16DL
M
×
+
DL
2048
N
×
2
UART
)
% Error
0.015%
0.015%
0.0195%
(2)
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