TCC76 Datasheet, PDF (91/259 Pages) List of Unclassifed Manufacturers – 32-bit RISC Microprocessor For Digital Media Player

TCC76x
Specification Rev. 0.07
32-bit RISC Microprocessor for Digital Media Player
February 23, 2005
TIMER / COUNTER
Timer/Counter n Configuration Register (TCFGn)
0x80000200 + (0x10 * n)
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0
CC POL
TCKSEL
IEN PWM CON EN
CC [8]
0
1
Clear Count
TCNTn is not cleared.
TCNTn is cleared to zero.
POL [7]
0
1
TCK Polarity
TCNTn is incremented at rising edge of the selected counting clock
TCNTn is incremented at falling edge of the selected counting
clock
TCKSEL
[6:4]
k=0~4
k = 5, 6
k=7
TCK Select
TCK is internally generated from divider circuit. It is driven by TCLK,
and this value determines the division factor of this circuit. Division
factor is 2^(k+1).
TCK is internally generated from divider circuit. It is driven by TCLK,
and this value determines the division factor of this circuit. Division
factor is 2^2k
TCK is the external pin shared by external interrupt signal. In the
TCC76x, there are 4 external pins for this purpose, so this configuration
is valid only for timer/counter 3 ~ 0. (not for timer/counter 5, 4)
IEN [3]
1
0
Interrupt Enable
Enable Timer/Counter interrupt
Disable Timer/Counter interrupt
PWM [2]
1
0
PWM Mode Enable
Enable PWM mode
Timer/Counter output is changed at every time the TCNTn is equal to
TREFn and TMREFn value. It can be used to generate PWM
waveform, by changing TMREFn while fixing TREFn. (where, TREFn
> TMREFn)
Disable PWM mode
Timer/Counter output can be changed only when the TCNTn is equal
to TREFn.
It can be used to generate a rectangular pulse of variable frequency.
The output of 6 Timer/Counters can be monitored through GPIO_A ports.
Refer to GPIO chapter for more information.
CON [1]
0
1
Continue Counting
When the TCNTn is reached to TREFn, TCNTn restarts counting
from 0 at the next pulse of selected clock source.
The TCNTn continues counting from the TREFn.
EN [0]
1
Timer/Counter Enable
Timer counter is enabled.
Preliminary
6-3