TMPM330 - Keil

5.4.4 System Clock Pin Output Function
Under development
TMPM330 (rev0.4) 5-12
TMPM330
The TMPM330 enables to output the system clock from a pin. The PK1/SCOUT pin can output the low
speed clock fs, the system clock fsys and the prescaler input clock for peripheral I/O φT0. By setting the
port K registers, the PKCR and PKFR1 to “1”, the PK1/SCOUT pin (pin number 51)
becomes the SCOUT output pin. The output clock is selected by setting the SYSCR3.
SCOUT
selection
SYSCR2
Table 5-5 shows the pin states in each mode when the SCOUT pin is set to the SCOUT output.
Mode
= “00” Output the fs clock.
= “10” Output the fsys clock.
= “11” Output the ΦT0
clock.
Table 5-5 Scout Output State in Each Mode
Low power consumption mode
NORMAL SLOW IDLE SLEEP STOP
(Note) The phase difference (AC timing) between the system clock output by the SCOUT and the
internal clock is not guaranteed.
5.5 Prescaler Clock Control
Each internal I/O (TMRB0-9, SIO0-2 and SBI0-2) has a prescaler for dividing a clock. As the clock φT0
to be input to each prescaler, the "fperiph" clock specified in the SYSCR1 can be divided
according to the setting in the SYSCR1. After the controller is reset, fperiph/1 is selected as
φT0.
5.6 Clock Multiplication Circuit
Fixed to “0” or “1”.
This circuit, which is included in the PLL, outputs the fpll clock that is quadruple of the high-speed
oscillator output clock, fosc. This lowers the oscillator input frequency while increasing the internal clock
speed.
Clock/ Mode Control