AT90S8535-8AC Atmel, AT90S8535-8AC Datasheet - Page 35
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AT90S8535-8AC
Manufacturer Part Number
AT90S8535-8AC
Description
IC MCU 8K FLSH 8MHZ A/D 44TQFP
Manufacturer
Atmel
Series
AVR® 90Sr
Specifications of AT90S8535-8AC
Core Processor
AVR
Core Size
8-Bit
Speed
8MHz
Connectivity
SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
32
Program Memory Size
8KB (4K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 6 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
44-TQFP, 44-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT90S8535-8AC
Manufacturer:
ROHM
Quantity:
6 934
Part Number:
AT90S8535-8AC
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
16-bit Timer/Counter1
1041H–11/01
Figure 31 shows the block diagram for Timer/Counter1.
Figure 31. Timer/Counter1 Block Diagram
The 16-bit Timer/Counter1 can select clock source from CK, prescaled CK or an exter-
nal pin. In addition, it can be stopped as described in the specification for the
Timer/Counter1 Control Registers (TCCR1A and TCCR1B). The different status flags
(Overflow, Compare Match and Capture Event) and control signals are found in the
Timer/Counter1 Control Registers (TCCR1A and TCCR1B). The interrupt enable/dis-
able settings for Timer/Counter1 are found in the Timer/Counter Interrupt Mask Register
(TIMSK).
When Timer/Counter1 is externally clocked, the external signal is synchronized with the
oscillator frequency of the CPU. To assure proper sampling of the external clock, the
minimum time between two external clock transitions must be at least one internal CPU
clock period. The external clock signal is sampled on the rising edge of the internal CPU
clock.
The 16-bit Timer/Counter1 features both a high-resolution and a high-accuracy usage
with the lower prescaling opportunities. Similarly, the high prescaling opportunities
makes the Timer/Counter1 useful for lower speed functions or exact timing functions
with infrequent actions.
The Timer/Counter1 supports two Output Compare functions using the Output Compare
Register 1A and B (OCR1A and OCR1B) as the data sources to be compared to the
Timer/Counter1 contents. The Output Compare functions include optional clearing of
15
15
15
15
TIMER/COUNTER1 OUTPUT COMPARE REGISTER A
REGISTER (TIMSK)
TIMER INT. MASK
T/C1 INPUT CAPTURE REGISTER (ICR1)
T/C1 OVER-
FLOW IRQ
TIMER/COUNTER1 (TCNT1)
16 BIT COMPARATOR
8
8
8
8
T/C1 COMPARE
7
7
7
7
MATCHA IRQ
REGISTER (TIFR)
TIMER INT. FLAG
CAPTURE
TRIGGER
T/C1 COMPARE
MATCHB IRQ
0
0
0
0
REGISTER A (TCCR1A)
15
15
TIMER/COUNTER1 OUTPUT COMPARE REGISTER B
T/C CLEAR
T/C CLOCK SOURCE
UP/DOWN
CAPTURE IRQ
T/C1 CONTROL
T/C1 INPUT
16 BIT COMPARATOR
AT90S/LS8535
CONTROL
8
8
LOGIC
7
7
REGISTER B (TCCR1B)
T/C1 CONTROL
0
0
CK
T1
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