29
AT90S/LS2323/2343
1004D–09/01
Figure 30. Timer/Counter 0 Block Diagram
Timer/Counter0 Control
Register – TCCR0
• Bits 7..3 – Res: Reserved Bits
These bits are reserved bits in the AT90S2323/2343 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.
T0
Bit 76 5 4 3 210
$33 ($53) –– – – –CS02 CS01 CS00 TCCR0
Read/Write R R R R R R/W R/W R/W
Initial Value 0 0 0 0 0 0 0 0
Table 10. Clock 0 Prescale Select
CS02 CS01 CS00 Description
0 0 0 Stop, the Timer/Counter0 is stopped.
001CK
010CK/8
011CK/64
1 0 0 CK/256
1 0 1 CK/1024
1 1 0 External Pin T0, falling edge
1 1 1 External Pin T0, rising edge
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