TCC720 Datasheet, PDF (39/143 Pages) List of Unclassifed Manufacturers – 32-bit RISC Microprocessor For Digital Media Player

TCC720
32-bit RISC Microprocessor for Digital Media Player
Dec. 16. 2002
TIMER / COUNTER
Preliminary Spec 0.51
5 TIMER / COUNTER
5.1 Overview
The TCC720 has four 16bit and two 20bit timer counter. Each timer counter has 3 registers for
various operation modes. Refer to register description table for details. When operating in
counter modes, External interrupt pin is used as counting clock for that counter.
The main clock frequency of timer counter can be configured by setting TCLK frequency. (Refer
to Clock generator block) With the 12bit internal basic counter, the timer counter can generate
various intervals from micro-seconds to seconds unit.
The following figure represents the block diagram of timer counter.
pi_EXTIN
Basic
Counter
TCFG
TCNT
TREF
Clock
Selector
Counter
Compare
(=)
TREQ
Tgl
TCO
Figure 5.1 Timer Counter Block Diagram
The following table explains the three registers of each timer counter. The address of each timer
counter is 16bytes aligned. The base address of timer counter is 0x80000200.
The number n represents for each timer/counter. In case of timer/counter 4, 5 (that is n = 4 or 5)
5-1