at90ls8535-8mi ATMEL Corporation, at90ls8535-8mi Datasheet - Page 34
at90ls8535-8mi
Manufacturer Part Number
at90ls8535-8mi
Description
8-bit Microcontroller With 8k Bytes In-system Programmable Flash
Manufacturer
ATMEL Corporation
Datasheet
1.AT90LS8535-8MI.pdf
(127 pages)
- Current page: 34 of 127
- Download datasheet (3Mb)
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
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