ADUC7060BSTZ32 Analog Devices Inc, ADUC7060BSTZ32 Datasheet - Page 79

• Manufacturer Part Number: ADUC7060BSTZ32
• Description: DUAL 24-BIT AFE AND ARM 7 I.C
• Manufacturer: Analog Devices Inc
• Series: MicroConverter® ADuC7xxxr

Specifications of ADUC7060BSTZ32

• Design Resources: 4 mA-to-20 mA Loop-Powered Temperature Monitor Using ADuC7060/1 (CN0145) Low power, Long Range, ISM Wireless Measuring Node (CN0164)
• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 10MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: POR, PWM, Temp Sensor, WDT
• Number Of I /o: 14
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 2.375 V ~ 2.625 V
• Data Converters: A/D 5x24b, 8x24b, D/A 1x14b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 48-LQFP
• Cpu Family: ADuC7xxx
• Device Core: ARM7TDMI
• Device Core Size: 16/32Bit
• Frequency (max): 10.24MHz
• Interface Type: I2C/SPI/UART
• Total Internal Ram Size: 4KB
• # I/os (max): 14
• Number Of Timers - General Purpose: 4
• Operating Supply Voltage (typ): 2.5V
• Operating Supply Voltage (max): 2.625V
• Operating Supply Voltage (min): 2.375V
• On-chip Adc: 2(4-chx24-bit)
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 48
• Package Type: LQFP
• Package: 48LQFP
• Family Name: ADuC7xxx
• Maximum Speed: 10.24 MHz
• Operating Supply Voltage: 2.5 V
• Data Bus Width: 16|32 Bit
• Number Of Programmable I/os: 14
• Number Of Timers: 4
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Compliant

UART SERIAL INTERFACE
Each ADuC706x features a 16450-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 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
P1.0/IRQ1/SIN/T0 and P1.1/SOUT pins of the ADuC706x.
The serial communication adopts an asynchronous protocol
that supports various word lengths, stop bits, and parity genera-
tion options selectable in the configuration register.
BAUD RATE GENERATION
The ADuC706x features two methods of generating the UART
baud rate: normal 450 UART baud rate generation and
ADuC706x fractional divider.
Normal 450 UART Baud Rate Generation
The baud rate is a divided version of the core clock using the
value in COMDIV0 and COMDIV1 MMRs (16-bit value,
divisor latch (DL)). The standard baud rate generator formula is
Table 87 lists common baud rate values.
Table 87. Baud Rate Using the Standard Baud Rate Generator
Baud Rate
9600
19,200
115,200
ADuC706x Fractional Divider
The fractional divider combined with the normal baud rate
generator allows the generation of accurate high speed baud rates.
Baud
CLOCK
CORE
Figure 27. Fractional Divider Baud Rate Generation
Rate
=
/(M + N/2048)
DL
0x21
0x11
0x3
10
16
.
/2
24
×
2
MHz
×
DL
Actual Baud Rate
9696
18,824
106,667
FBEN
/16DL
UART
% Error
1.01%
1.96%
7.41%
Rev. B | Page 79 of 108
(1)
Calculation of the baud rate using a fractional divider is as
follows:
Table 88 lists common baud rate values.
Table 88. Baud Rate Using the Fractional Baud Rate Generator
Baud Rate
9600
19,200
115,200
UART REGISTER DEFINITIONS
The UART interface consists of the following 11 registers:
COMTX: 8-bit transmit register
COMRX: 8-bit receive register
COMDIV0: divisor latch (low byte)
COMDIV1: divisor latch (high byte)
COMCON0: line control register
COMCON1: line control register
COMSTA0: line status register
COMSTA1: line status register
COMIEN0: interrupt enable register
COMIID0: interrupt identification register
COMDIV2: 16-bit fractional baud divide register
COMTX, COMRX, and COMDIV0 share the same address
location. COMTX and COMRX can be accessed when Bit 7 in
the COMCON0 register is cleared. COMDIV0 or COMDIV1
can be accessed when Bit 7 of COMCON0 or COMCON1,
respectively, is set.
Baud
M
+
2048
Rate
N
DL
0x21
0x10
0x2
=
=
Baud
16
×
M
1
1
1
DL
10
Rate
10
×
.
24
.
N
21
85
796
24
2
×
×
MHz
ADuC7060/ADuC7061
16
MHz
(
M
×
Actual Baud Rate
9598.55
19,203
115,218
+
DL
2048
N
×
2
)
% Error
0.015%
0.015%
0.015%
(2)