Rainbow-electronics AT90LS2343 Uživatelský manuál stáhnout pdf (Strana 29)

AT90S/LS2323/2343

1004D–09/01

Figure 30. Timer/Counter 0 Block Diagram

Timer/Counter0 Control

• 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.

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

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 63 64

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Rainbow-electronics AT90LS2343 Uživatelský manuál Strana 29