AT90S8535-8AC Atmel, AT90S8535-8AC Datasheet - Page 34
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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
Timer/Counter0 Control
Register – TCCR0
Timer Counter 0 – TCNT0
34
AT90S/LS8535
• Bits 7..3 – Res: Reserved Bits
These bits are reserved bits in the AT90S8535 and always read zero.
• Bits 2, 1, 0 – CS02, CS01, CS00: Clock Select0, Bits 2, 1 and 0
The Clock Select0 bits 2,1 and 0 define the prescaling source of Timer/Counter0.
Table 10. Clock 0 Prescale Select
The Stop condition provides a Timer Enable/Disable function. The prescaled CK modes
are scaled directly from the CK oscillator clock. If the external pin modes are used, the
corresponding setup must be performed in the actual Data Direction Control Register
(cleared to zero gives an input pin).
The Timer/Counter0 is realized as an up-counter with read and write access. If the
Timer/Counter0 is written and a clock source is present, the Timer/Counter0 continues
counting in the clock cycle following the write operation.
Bit
$33 ($53)
Read/Write
Initial Value
Bit
$32 ($52)
Read/Write
Initial Value
CS02
0
0
0
0
1
1
1
1
MSB
R/W
R
7
–
0
7
0
CS01
0
0
1
1
0
0
1
1
R/W
R
6
–
0
6
0
CS00
R/W
R
5
–
0
0
1
0
1
0
1
0
1
5
0
R/W
4
0
Description
Stop, Timer/Counter0 is stopped.
CK
CK/8
CK/64
CK/256
CK/1024
External Pin T0, falling edge
External Pin T0, rising edge
R
4
–
0
R/W
3
0
R
3
–
0
R/W
2
0
CS02
R/W
2
0
R/W
1
0
CS01
R/W
1
0
LSB
R/W
CS00
R/W
0
0
0
0
1041H–11/01
TCNT0
TCCR0