Rainbow Electronics AT90LS4433 - Manual (Page 34)

34
AT90S/LS4433
1042G–AVR–09/02
Figure 31. Timer/Counter0 Block Diagram
Timer/Counter0 Control
Register – TCCR0
• Bits 7 – 3 – Res: Reserved Bits
These bits are reserved bits in the AT90S4433 and always read as 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.
OCIE1
OCF1
T0
Bit 7 6 5 4 3 2 1 0
$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 9. Clock 0 Prescale Select
CS02 CS01 CS00 Description
0 0 0 Stop, Timer/Counter0 is stopped.
0 0 1 CK
0 1 0 CK/8
0 1 1 CK/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