ADUC836BSZ Analog Devices Inc, ADUC836BSZ Datasheet - Page 54

• Manufacturer Part Number: ADUC836BSZ
• Description: 16bit Dual ADC With Embedded 8 Bit MCU
• Manufacturer: Analog Devices Inc
• Series: MicroConverter® ADuC8xxr

Specifications of ADUC836BSZ

• Core Processor: 8052
• Core Size: 8-Bit
• Speed: 12.58MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART
• Peripherals: POR, PSM, PWM, Temp Sensor, WDT
• Number Of I /o: 34
• Program Memory Size: 62KB (62K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 2.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.25 V
• Data Converters: A/D 7x16b; D/A 1x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 52-MQFP, 52-PQFP
• Cpu Family: ADuC8xx
• Device Core: 8052
• Device Core Size: 8b
• Frequency (max): 12.58MHz
• Interface Type: I2C/SPI/UART
• Total Internal Ram Size: 2.25KB
• # I/os (max): 26
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.25V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 2(2-chx16-bit)
• On-chip Dac: 1-chx12-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 52
• Package Type: MQFP
• Package: 52MQFP
• Family Name: ADuC8xx
• Maximum Speed: 12.58 MHz
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 26
• Number Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TIMER/COUNTER 0 AND 1 OPERATING MODES
The following paragraphs describe the operating modes for Timer/
Counters 0 and 1. Unless otherwise noted, it should be assumed
that these modes of operation are the same for both Timer 0 and 1.
Mode 0 (13-Bit Timer/Counter)
Mode 0 configures an 8-bit timer/counter with a divide-by-32
prescaler. Figure 48 shows Mode 0 operation.
In this mode, the timer register is configured as a 13-bit register.
As the count rolls over from all 1s to all 0s, it sets the timer over-
flow flag. The overflow flag, TF0, can then be used to request an
interrupt.The counted input is enabled to the timer when TR0 = 1
and either Gate = 0 or INT0 = 1. Setting Gate = 1 allows the
timer to be controlled by external input INT0 to facilitate pulse-
width measurements. TR0 is a control bit in the special function
register TCON; Gate is in TMOD. The 13-bit register consists
of all eight bits of TH0 and the lower five bits of TL0. The upper
three bits of TL0 are indeterminate and should be ignored. Setting
the run flag (TR0) does not clear the registers.
Mode 1 (16-Bit Timer/Counter)
Mode 1 is the same as Mode 0, except that the timer register is
running with all 16 bits. Mode 1 is shown in Figure 49.
ADuC836
*THE CORE CLOCK IS THE OUTPUT OF THE PLL (SEE THE ON-CHIP PLL SECTION)
P3.2/INT0
P3.4/T0
P3.2/INT0
P3.4/T0
*THE CORE CLOCK IS THE OUTPUT OF THE PLL (SEE THE ON-CHIP PLL SECTION)
CORE
CLK*
CORE
CLK*
GATE
GATE
 12
 12
Figure 48. Timer/Counter 0, Mode 0
Figure 49.Timer/Counter 0, Mode 1
TR0
TR0
C/ T = 0
C/ T = 1
C/ T = 0
C/ T = 1
CONTROL
CONTROL
(8 BITS)
(5 BITS)
TL0
TL0
(8 BITS)
(8 BITS)
TH0
TH0
TF0
TF0
INTERRUPT
INTERRUPT
–54–
Mode 2 (8-Bit Timer/Counter with Auto Reload)
Mode 2 configures the timer register as an 8-bit counter (TL0)
with automatic reload, as shown in Figure 50. Overflow from TL0
not only sets TF0, but also reloads TL0 with the contents of TH0,
which are preset by software. The reload leaves TH0 unchanged.
Mode 3 (Two 8-Bit Timer/Counters)
Mode 3 has different effects on Timer 0 and Timer 1. Timer 1 in
Mode 3 simply holds its count. The effect is the same as setting
TR1 = 0. Timer 0 in Mode 3 establishes TL0 and TH0 as two
separate counters. This configuration is shown in Figure 51. TL0
uses the Timer 0 control bits: C/T, Gate, TR0, INT0, and TF0.
TH0 is locked into a timer function (counting machine cycles)
and takes over the use of TR1 and TF1 from Timer 1. Thus, TH0
now controls the Timer 1 interrupt. Mode 3 is provided for appli-
cations requiring an extra 8-bit timer or counter.
When Timer 0 is in Mode 3,Timer 1 can be turned on and off by
switching it out of and into its own Mode 3, or it can still be used by
the serial interface as a baud rate generator. In fact, it can be used in
any application not requiring an interrupt from Timer 1 itself.
P3.2/INT0
P3.4/T0
P3.4/T0
P3.2/INT0
*THE CORE CLOCK IS THE OUTPUT OF THE PLL (SEE THE ON-CHIP PLL SECTION)
*THE CORE CLOCK IS THE OUTPUT OF THE PLL (SEE THE ON-CHIP PLL SECTION)
CLK/12
CORE
CORE
CLK*
CLK*
CORE
GATE
GATE
TR1
 12
 12
Figure 50. Timer/Counter 0, Mode 2
Figure 51.Timer/Counter 0, Mode 3
TR0
TR0
C/ T = 0
C/ T = 1
C/ T = 0
C/ T = 1
CORE
CLK/12
CONTROL
CONTROL
RELOAD
(8 BITS)
(8 BITS)
(8 BITS)
(8 BITS)
TL0
TH0
TH0
TL0
TF0
TF1
TF0
INTERRUPT
INTERRUPT
INTERRUPT
REV. A