ADUC836BSZ Analog Devices Inc, ADUC836BSZ Datasheet - Page 52

• 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

TIMERS/COUNTERS
The ADuC836 has three 16-bit Timer/Counters:Timer 0,Timer 1,
and Timer 2. The Timer/Counter hardware has been included
on-chip to relieve the processor core of the overhead inherent in
implementing timer/counter functionality in software. Each
Timer/Counter consists of two 8-bit registers: THx and TLx
(x = 0, 1, and 2). All three can be configured to operate either as
timers or event counters.
In Timer function, the TLx Register is incremented every machine
cycle. Thus it can be viewed as counting machine cycles. Since
a machine cycle consists of 12 core clock periods, the maximum
count rate is 1/12 of the core clock frequency.
In Counter function, the TLx Register is incremented by a 1-to-0
transition at its corresponding external input pin, T0, T1, or T2.
In this function, the external input is sampled during S5P2 of
TMOD
SFR Address
Power-On Default Value
Bit Addressable
Bit
7
6
5
4
3
2
1
0
ADuC836
Name
Gate
C/T
M1
M0
Gate
C/T
M1
M0
Description
Timer 1 Gating Control.
Set by software to enable Timer/Counter 1 only while INT1 pin is high and TR1 control bit is set.
Cleared by software to enable Timer 1 whenever TR1 control bit is set.
Timer 1 Timer or Counter Select Bit.
Set by software to select counter operation (input from T1 pin).
Cleared by software to select timer operation (input from internal system clock).
Timer 1 Mode Select Bit 1 (used with M0 Bit)
Timer 1 Mode Select Bit 0.
M1
0
0
1
1
Timer 0 Gating Control.
Set by software to enable Timer/Counter 0 only while INT0 pin is high and TR0 control bit is set.
Cleared by software to enable Timer 0 whenever TR0 control bit is set.
Timer 0 Timer or Counter Select Bit.
Set by software to select counter operation (input from T0 pin).
Cleared by software to select timer operation (input from internal system clock).
Timer 0 Mode Select Bit 1
Timer 0 Mode Select Bit 0.
M1
0
0
1
1
M0
0
1
0
1
M0
0
1
0
1
Timer/Counter 0 and 1 Mode Register
89H
00H
No
TH1 operates as an 8-bit timer/counter. TL1 serves as 5-bit prescaler.
16-Bit Timer/Counter. TH1 and TL1 are cascaded; there is no prescaler.
8-Bit Autoreload Timer/Counter. TH1 holds a value that is to be reloaded into TL1 each
time it overflows.
Timer/Counter 1 stopped.
TH0 operates as an 8-bit timer/counter. TL0 serves as 5-bit prescaler.
16-Bit Timer/Counter. TH0 and TL0 are cascaded; there is no prescaler.
8-Bit Autoreload Timer/Counter. TH0 holds a value that is to be reloaded into TL0 each time
it overflows.
TL0 is an 8-bit timer/counter controlled by the standard Timer 0 control bits. TH0 is an 8-bit
timer only, controlled by Timer 1 control bits.
Table XXVI. TMOD SFR Bit Designations
–52–
every machine cycle. When the samples show a high in one cycle
and a low in the next cycle, the count is incremented. The new
count value appears in the register during S3P1 of the cycle fol-
lowing the one in which the transition was detected. Since it takes
two machine cycles (16 core clock periods) to recognize a 1-to-0
transition, the maximum count rate is 1/16 of the core clock fre-
quency. There are no restrictions on the duty cycle of the external
input signal, but to ensure that a given level is sampled at least
once before it changes, it must be held for a minimum of one full
machine cycle. Remember that the core clock frequency is pro-
grammed via the CD0–2 selection bits in the PLLCON SFR.
User configuration and control of the timers is achieved via three
main SFRs: TMOD and TCON control the configuration of
Timers 0 and 1, while T2CON configures Timer 2.
REV. A